diff --git a/v2rayN/ServiceLib.UdpTest/Socks5UdpChannel.cs b/v2rayN/ServiceLib.UdpTest/Socks5UdpChannel.cs
index f9a2951f..45f93c22 100644
--- a/v2rayN/ServiceLib.UdpTest/Socks5UdpChannel.cs
+++ b/v2rayN/ServiceLib.UdpTest/Socks5UdpChannel.cs
@@ -11,7 +11,7 @@ public class Socks5UdpChannel(string socks5Host, int socks5TcpPort) : IDisposabl
     /// <summary>
     /// Send UDP data to a remote endpoint (IP address)
     /// </summary>
-    public async Task SendAsync(IPEndPoint remote, byte[] data)
+    public async Task SendAsync(IPEndPoint remote, byte[] data, CancellationToken ct = default)
     {
         var addrData = new Socks5AddressData
         {
@@ -22,7 +22,7 @@ public class Socks5UdpChannel(string socks5Host, int socks5TcpPort) : IDisposabl
             Port = (ushort)remote.Port
         };
         var packet = BuildSocks5UdpPacket(addrData, data);
-        await _udpClient.SendAsync(packet, packet.Length, _relayEndPoint);
+        await _udpClient.SendAsync(packet.AsMemory(), _relayEndPoint, ct);
     }
 
     /// <summary>
@@ -31,7 +31,8 @@ public class Socks5UdpChannel(string socks5Host, int socks5TcpPort) : IDisposabl
     /// <param name="host">Domain name or IP address</param>
     /// <param name="port">Port number</param>
     /// <param name="data">Data to send</param>
-    public async Task SendAsync(string host, ushort port, byte[] data)
+    /// <param name="ct">Cancellation token</param>
+    public async Task SendAsync(string host, ushort port, byte[] data, CancellationToken ct = default)
     {
         var addrData = new Socks5AddressData();
 
@@ -53,7 +54,8 @@ public class Socks5UdpChannel(string socks5Host, int socks5TcpPort) : IDisposabl
         addrData.Port = port;
 
         var packet = BuildSocks5UdpPacket(addrData, data);
-        await _udpClient.SendAsync(packet, packet.Length, _relayEndPoint);
+        //await _udpClient.SendAsync(packet, packet.Length, _relayEndPoint);
+        await _udpClient.SendAsync(packet.AsMemory(), _relayEndPoint, ct);
     }
 
     /// <summary>
diff --git a/v2rayN/ServiceLib.UdpTest/UdpTestService.cs b/v2rayN/ServiceLib.UdpTest/UdpTestService.cs
index be4b943d..27daeca1 100644
--- a/v2rayN/ServiceLib.UdpTest/UdpTestService.cs
+++ b/v2rayN/ServiceLib.UdpTest/UdpTestService.cs
@@ -88,17 +88,18 @@ public class UdpTestService
         return (targetServerHost, _udpTest.GetDefaultTargetPort());
     }
 
-    public async Task<TimeSpan> SendUdpRequestAsync(string targetServerHost, int socks5Port, TimeSpan operationTimeout)
+    public async Task<TimeSpan> SendUdpRequestAsync(string targetServerHost, int socks5Port, CancellationToken ct = default)
     {
-        using var cts = new CancellationTokenSource(operationTimeout);
-        var cancellationToken = cts.Token;
+        using var timeoutCts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+        using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(ct, timeoutCts.Token);
+        var linkedCt = linkedCts.Token;
         var udpRequestPacket = _udpTest.BuildUdpRequestPacket();
         if (udpRequestPacket == null || udpRequestPacket.Length == 0)
         {
             throw new InvalidOperationException("Failed to build UDP request packet.");
         }
         using var channel = new Socks5UdpChannel("127.0.0.1", socks5Port);
-        if (!await channel.EstablishUdpAssociationAsync(cancellationToken).ConfigureAwait(false))
+        if (!await channel.EstablishUdpAssociationAsync(linkedCt).ConfigureAwait(false))
         {
             throw new Exception("Failed to establish UDP association with SOCKS5 proxy.");
         }
@@ -116,8 +117,8 @@ public class UdpTestService
             {
                 var stopwatch = new Stopwatch();
                 stopwatch.Start();
-                await channel.SendAsync(targetHost, targetPort, udpRequestPacket).ConfigureAwait(false);
-                var (_, receiveResult) = await channel.ReceiveAsync(cancellationToken).ConfigureAwait(false);
+                await channel.SendAsync(targetHost, targetPort, udpRequestPacket, linkedCt).ConfigureAwait(false);
+                var (_, receiveResult) = await channel.ReceiveAsync(linkedCt).ConfigureAwait(false);
                 stopwatch.Stop();
 
                 udpReceiveResult = receiveResult;
diff --git a/v2rayN/ServiceLib/Common/Utils.cs b/v2rayN/ServiceLib/Common/Utils.cs
index 2a59f380..daecda93 100644
--- a/v2rayN/ServiceLib/Common/Utils.cs
+++ b/v2rayN/ServiceLib/Common/Utils.cs
@@ -1018,12 +1018,12 @@ public class Utils
         return new Dictionary<string, string>();
     }
 
-    public static async Task<string?> GetCliWrapOutput(string filePath, string? arg)
+    public static async Task<string?> GetCliWrapOutput(string filePath, string? arg, CancellationToken cancellationToken = default)
     {
-        return await GetCliWrapOutput(filePath, arg != null ? new List<string>() { arg } : null);
+        return await GetCliWrapOutput(filePath, arg != null ? new List<string>() { arg } : null, cancellationToken);
     }
 
-    public static async Task<string?> GetCliWrapOutput(string filePath, IEnumerable<string>? args)
+    public static async Task<string?> GetCliWrapOutput(string filePath, IEnumerable<string>? args, CancellationToken cancellationToken = default)
     {
         try
         {
@@ -1040,7 +1040,7 @@ public class Utils
                 }
             }
 
-            var result = await cmd.ExecuteBufferedAsync();
+            var result = await cmd.ExecuteBufferedAsync(cancellationToken);
             if (result.IsSuccess)
             {
                 return result.StandardOutput ?? "";
diff --git a/v2rayN/ServiceLib/Global.cs b/v2rayN/ServiceLib/Global.cs
index dc125cc8..009985d7 100644
--- a/v2rayN/ServiceLib/Global.cs
+++ b/v2rayN/ServiceLib/Global.cs
@@ -96,6 +96,11 @@ public class Global
     public const string StringTrue = "true";
     public const string StringFalse = "false";
     public const int SqliteMaxBatchSize = 10000;
+    public static readonly TimeSpan LocalFetch = TimeSpan.FromSeconds(5);
+    public static readonly TimeSpan DirectFetch = TimeSpan.FromSeconds(10);
+    public static readonly TimeSpan ProxyFetch  = TimeSpan.FromSeconds(30);
+    public static readonly TimeSpan DirectDownloadConnect = TimeSpan.FromSeconds(5);
+    public static readonly TimeSpan ProxyDownloadConnect = TimeSpan.FromSeconds(10);
 
     public const string SingboxDirectDNSTagPrefix = "direct-dns-";
     public const string SingboxRemoteDNSTagPrefix = "remote-dns-";
diff --git a/v2rayN/ServiceLib/Handler/ConnectionHandler.cs b/v2rayN/ServiceLib/Handler/ConnectionHandler.cs
index 2cea1e0f..5bd808b5 100644
--- a/v2rayN/ServiceLib/Handler/ConnectionHandler.cs
+++ b/v2rayN/ServiceLib/Handler/ConnectionHandler.cs
@@ -66,34 +66,41 @@ public static class ConnectionHandler
     /// <summary>
     /// Measures response time by sending HTTP requests through proxy.
     /// </summary>
-    public static async Task<int> GetRealPingTime(IWebProxy? webProxy, int downloadTimeout = 9)
+    public static async Task<int> GetRealPingTime(IWebProxy? webProxy, CancellationToken cancellationToken = default)
     {
         var url = AppManager.Instance.Config.SpeedTestItem.SpeedPingTestUrl;
         var responseTime = -1;
         try
         {
-            using var cts = new CancellationTokenSource();
-            cts.CancelAfter(TimeSpan.FromSeconds(downloadTimeout));
+            using var timeoutCts = new CancellationTokenSource();
+            timeoutCts.CancelAfter(Global.LocalFetch);
+            using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, timeoutCts.Token);
+            var linkedToken = linkedCts.Token;
             using var client = new HttpClient(new SocketsHttpHandler()
             {
                 Proxy = webProxy,
                 UseProxy = webProxy != null,
-                ConnectTimeout = TimeSpan.FromSeconds(3)
+                ConnectTimeout = Global.LocalFetch,
             });
 
             List<int> oneTime = [];
             for (var i = 0; i < 2; i++)
             {
                 var timer = Stopwatch.StartNew();
-                await client.GetAsync(url, cts.Token).ConfigureAwait(false);
+                await client.GetAsync(url, linkedToken).ConfigureAwait(false);
                 timer.Stop();
                 oneTime.Add((int)timer.Elapsed.TotalMilliseconds);
-                await Task.Delay(100, cts.Token);
+                await Task.Delay(100, linkedToken);
             }
             responseTime = oneTime.Where(x => x > 0).OrderBy(x => x).FirstOrDefault();
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch
         {
+            // Ignore
         }
         return responseTime;
     }
@@ -101,7 +108,7 @@ public static class ConnectionHandler
     /// <summary>
     /// Gets IP and country information through specified proxy.
     /// </summary>
-    public static async Task<IpInfoResult?> GetIPInfo(IWebProxy? webProxy)
+    public static async Task<IpInfoResult?> GetIPInfo(IWebProxy? webProxy, CancellationToken cancellationToken = default)
     {
         try
         {
@@ -112,7 +119,7 @@ public static class ConnectionHandler
             }
 
             var downloadHandle = new DownloadService();
-            var result = await downloadHandle.TryDownloadString(url, webProxy, "");
+            var result = await downloadHandle.TryDownloadString(url, webProxy, "", cancellationToken);
             if (result == null)
             {
                 return null;
@@ -129,6 +136,10 @@ public static class ConnectionHandler
 
             return new IpInfoResult(country, ip);
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch
         {
             return null;
diff --git a/v2rayN/ServiceLib/Helper/DownloaderHelper.cs b/v2rayN/ServiceLib/Helper/DownloaderHelper.cs
index e7d553ef..bbae3db5 100644
--- a/v2rayN/ServiceLib/Helper/DownloaderHelper.cs
+++ b/v2rayN/ServiceLib/Helper/DownloaderHelper.cs
@@ -8,16 +8,14 @@ public class DownloaderHelper
     private static readonly Lazy<DownloaderHelper> _instance = new(() => new());
     public static DownloaderHelper Instance => _instance.Value;
 
-    public async Task<string?> DownloadStringAsync(IWebProxy? webProxy, string url, string? userAgent, int timeout,
-        IReadOnlyDictionary<string, string>? requestHeaders = null, string? acceptHeader = null)
+    public async Task<string?> DownloadStringAsync(IWebProxy? webProxy, string url, string? userAgent,
+        IReadOnlyDictionary<string, string>? requestHeaders = null, string? acceptHeader = null, CancellationToken cancellationToken = default)
     {
         if (url.IsNullOrEmpty())
         {
             return null;
         }
 
-        var connectTimeout = Math.Clamp(timeout / 5, 2, 5);
-
         Uri uri = new(url);
         //Authorization Header
         var headers = new WebHeaderCollection();
@@ -31,12 +29,11 @@ public class DownloaderHelper
             Headers = headers,
             Accept = acceptHeader,
             UserAgent = userAgent,
-            ConnectTimeout = connectTimeout * 1000,
+            ConnectTimeout = GetConnectTimeoutMs(webProxy != null),
             Proxy = webProxy
         };
         var downloadOpt = new DownloadConfiguration()
         {
-            BlockTimeout = timeout * 1000,
             MaxTryAgainOnFailure = 2,
             RequestConfiguration = requestConfiguration,
             CustomHttpMessageHandlerFactory = () => HttpRequestHeadersHelper.CreateHandler(GetSocketsHttpHandler(requestConfiguration), requestHeaders),
@@ -51,31 +48,26 @@ public class DownloaderHelper
             }
         };
 
-        using var cts = new CancellationTokenSource();
-        cts.CancelAfter(TimeSpan.FromSeconds(timeout));
-
-        await using var stream = await downloader.DownloadFileTaskAsync(address: url, cts.Token);
+        await using var stream = await downloader.DownloadFileTaskAsync(address: url, cancellationToken);
         using StreamReader reader = new(stream);
 
-        return await reader.ReadToEndAsync(cts.Token);
+        return await reader.ReadToEndAsync(cancellationToken);
     }
 
-    public async Task DownloadDataAsync4Speed(IWebProxy webProxy, string url, IProgress<string> progress, int timeout)
+    public async Task DownloadDataAsync4Speed(IWebProxy webProxy, string url, Action<string> onProgress, CancellationToken cancellationToken = default)
     {
         if (url.IsNullOrEmpty())
         {
             throw new ArgumentNullException(nameof(url));
         }
 
-        var connectTimeout = Math.Clamp(timeout / 5, 2, 5);
         var requestConfiguration = new RequestConfiguration()
         {
-            ConnectTimeout = connectTimeout * 1000,
+            ConnectTimeout = GetConnectTimeoutMs(true),
             Proxy = webProxy
         };
         var downloadOpt = new DownloadConfiguration()
         {
-            BlockTimeout = timeout * 1000,
             MaxTryAgainOnFailure = 2,
             RequestConfiguration = requestConfiguration,
             CustomHttpMessageHandlerFactory = () => GetSocketsHttpHandler(requestConfiguration),
@@ -88,49 +80,45 @@ public class DownloaderHelper
 
         downloader.DownloadProgressChanged += (sender, value) =>
         {
-            if (progress != null && value.BytesPerSecondSpeed > 0)
+            if (!(value.BytesPerSecondSpeed > 0))
             {
-                hasValue = true;
-                if (value.BytesPerSecondSpeed > maxSpeed)
-                {
-                    maxSpeed = value.BytesPerSecondSpeed;
-                }
+                return;
+            }
+            hasValue = true;
+            if (value.BytesPerSecondSpeed > maxSpeed)
+            {
+                maxSpeed = value.BytesPerSecondSpeed;
+            }
 
-                var ts = DateTime.Now - lastUpdateTime;
-                if (ts.TotalMilliseconds >= 1000)
-                {
-                    lastUpdateTime = DateTime.Now;
-                    var speed = (maxSpeed / 1000 / 1000).ToString("#0.0");
-                    progress.Report(speed);
-                }
+            var ts = DateTime.Now - lastUpdateTime;
+            if (ts.TotalMilliseconds >= 1000)
+            {
+                lastUpdateTime = DateTime.Now;
+                var speed = (maxSpeed / 1000 / 1000).ToString("#0.0");
+                onProgress.Invoke(speed);
             }
         };
         downloader.DownloadFileCompleted += (sender, value) =>
         {
-            if (progress != null)
+            if (hasValue && maxSpeed > 0)
             {
-                if (hasValue && maxSpeed > 0)
-                {
-                    var finalSpeed = (maxSpeed / 1000 / 1000).ToString("#0.0");
-                    progress.Report(finalSpeed);
-                }
-                else if (value.Error != null)
-                {
-                    progress.Report(value.Error?.Message);
-                }
-                else
-                {
-                    progress.Report("0");
-                }
+                var finalSpeed = (maxSpeed / 1000 / 1000).ToString("#0.0");
+                onProgress.Invoke(finalSpeed);
+            }
+            else if (value.Error != null)
+            {
+                onProgress.Invoke(value.Error?.Message);
+            }
+            else
+            {
+                onProgress.Invoke("0");
             }
         };
-        //progress.Report("......");
-        using var cts = new CancellationTokenSource();
-        cts.CancelAfter(TimeSpan.FromSeconds(timeout));
-        await using var stream = await downloader.DownloadFileTaskAsync(address: url, cts.Token);
+        //progress.Invoke("......");
+        await using var stream = await downloader.DownloadFileTaskAsync(address: url, cancellationToken);
     }
 
-    public async Task DownloadFileAsync(IWebProxy? webProxy, FileDownloadRequest request, Action<FileDownloadState> onProgress, TimeSpan connectTimeout, CancellationToken cancellationToken = default)
+    public async Task DownloadFileAsync(IWebProxy? webProxy, FileDownloadRequest request, Action<FileDownloadState> onProgress, CancellationToken cancellationToken = default)
     {
         ArgumentNullException.ThrowIfNull(request);
         if (request.FilePath.IsNullOrEmpty())
@@ -147,9 +135,9 @@ public class DownloaderHelper
             Request = request,
         };
 
-        var requestConfiguration = new RequestConfiguration()
+        var requestConfiguration = new RequestConfiguration
         {
-            ConnectTimeout = (int)connectTimeout.TotalMilliseconds,
+            ConnectTimeout = GetConnectTimeoutMs(webProxy != null),
             Proxy = webProxy,
         };
         var downloadOpt = new DownloadConfiguration()
@@ -196,7 +184,7 @@ public class DownloaderHelper
         await downloader.DownloadFileTaskAsync(request.FileUrl, request.FilePath, cancellationToken);
     }
 
-    public async Task DownloadSmallFilesAsync(IWebProxy? webProxy, List<FileDownloadRequest> requests, Action<ReadOnlyMemory<FileDownloadState>> onProgress, TimeSpan connectTimeout, CancellationToken cancellationToken = default)
+    public async Task DownloadSmallFilesAsync(IWebProxy? webProxy, List<FileDownloadRequest> requests, Action<ReadOnlyMemory<FileDownloadState>> onProgress, CancellationToken cancellationToken = default)
     {
         if (requests is not { Count: > 0 })
         {
@@ -215,7 +203,7 @@ public class DownloaderHelper
 
         var requestConfiguration = new RequestConfiguration()
         {
-            ConnectTimeout = (int)connectTimeout.TotalMilliseconds,
+            ConnectTimeout = GetConnectTimeoutMs(webProxy != null),
             Proxy = webProxy,
 
             KeepAlive = true,
@@ -225,7 +213,7 @@ public class DownloaderHelper
         var parallelOptions = new ParallelOptions
         {
             MaxDegreeOfParallelism = 4,
-            //CancellationToken = cancellationToken,
+            CancellationToken = cancellationToken,
         };
 
         await Parallel.ForEachAsync(Enumerable.Range(0, requests.Count), parallelOptions, async (index, parallelCancellationToken) =>
@@ -344,4 +332,9 @@ public class DownloaderHelper
 
         return handler;
     }
+
+    private int GetConnectTimeoutMs(bool isProxy)
+    {
+        return (int)(isProxy ? Global.ProxyDownloadConnect : Global.DirectDownloadConnect).TotalMilliseconds;
+    }
 }
diff --git a/v2rayN/ServiceLib/Manager/CertPemManager.cs b/v2rayN/ServiceLib/Manager/CertPemManager.cs
index 0df8301d..9b86bdf3 100644
--- a/v2rayN/ServiceLib/Manager/CertPemManager.cs
+++ b/v2rayN/ServiceLib/Manager/CertPemManager.cs
@@ -28,14 +28,13 @@ public class CertPemManager
     ///     Get certificate in PEM format from a server with CA pinning validation
     /// </summary>
     public async Task<(string?, string?)> GetCertPemAsync(string target, string serverName,
-        List<string>? verifyPeerCertByName = null, int timeout = 4)
+        List<string>? verifyPeerCertByName = null)
     {
         try
         {
             var (domain, _, port, _) = Utils.ParseUrl(target);
 
-            using var cts = new CancellationTokenSource();
-            cts.CancelAfter(TimeSpan.FromSeconds(timeout));
+            using var cts = new CancellationTokenSource(Global.LocalFetch);
 
             using var client = new TcpClient();
             await client.ConnectAsync(domain, port > 0 ? port : 443, cts.Token);
@@ -63,8 +62,8 @@ public class CertPemManager
         }
         catch (OperationCanceledException)
         {
-            Logging.SaveLog(_tag, new TimeoutException($"Connection timeout after {timeout} seconds"));
-            return (null, $"Connection timeout after {timeout} seconds");
+            Logging.SaveLog(_tag, new TimeoutException($"Connection timeout after {Global.LocalFetch.TotalSeconds} seconds"));
+            return (null, $"Connection timeout after {Global.LocalFetch.TotalSeconds} seconds");
         }
         catch (Exception ex)
         {
@@ -77,15 +76,14 @@ public class CertPemManager
     ///     Get certificate chain in PEM format from a server with CA pinning validation
     /// </summary>
     public async Task<(List<string>, string?)> GetCertChainPemAsync(string target, string serverName,
-        List<string>? verifyPeerCertByName = null, int timeout = 4)
+        List<string>? verifyPeerCertByName = null)
     {
         var pemList = new List<string>();
         try
         {
             var (domain, _, port, _) = Utils.ParseUrl(target);
 
-            using var cts = new CancellationTokenSource();
-            cts.CancelAfter(TimeSpan.FromSeconds(timeout));
+            using var cts = new CancellationTokenSource(Global.LocalFetch);
 
             using var client = new TcpClient();
             await client.ConnectAsync(domain, port > 0 ? port : 443, cts.Token);
@@ -116,8 +114,8 @@ public class CertPemManager
         }
         catch (OperationCanceledException)
         {
-            Logging.SaveLog(_tag, new TimeoutException($"Connection timeout after {timeout} seconds"));
-            return (pemList, $"Connection timeout after {timeout} seconds");
+            Logging.SaveLog(_tag, new TimeoutException($"Connection timeout after {Global.LocalFetch.TotalSeconds} seconds"));
+            return (pemList, $"Connection timeout after {Global.LocalFetch.TotalSeconds} seconds");
         }
         catch (Exception ex)
         {
diff --git a/v2rayN/ServiceLib/Manager/CoreManager.cs b/v2rayN/ServiceLib/Manager/CoreManager.cs
index 5e1527df..b2da9c77 100644
--- a/v2rayN/ServiceLib/Manager/CoreManager.cs
+++ b/v2rayN/ServiceLib/Manager/CoreManager.cs
@@ -216,7 +216,7 @@ public class CoreManager
         await _updateFunc?.Invoke(notify, msg);
     }
 
-    private static async Task WaitForProxyPort(CoreConfigContext? preContext, int timeoutMs = 5000)
+    private static async Task WaitForProxyPort(CoreConfigContext? preContext)
     {
         if (preContext is null)
         {
@@ -227,7 +227,7 @@ public class CoreManager
             return;
         }
 
-        using var rootCts = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeoutMs));
+        using var rootCts = new CancellationTokenSource(Global.LocalFetch);
         var rootToken = rootCts.Token;
 
         var port = preContext.Node.Port;
diff --git a/v2rayN/ServiceLib/Services/DownloadService.cs b/v2rayN/ServiceLib/Services/DownloadService.cs
index 8ec66f38..58a83ab2 100644
--- a/v2rayN/ServiceLib/Services/DownloadService.cs
+++ b/v2rayN/ServiceLib/Services/DownloadService.cs
@@ -20,24 +20,31 @@ public class DownloadService
     /// <summary>
     /// Downloads data with the specified proxy and reports progress messages.
     /// </summary>
-    public async Task<int> DownloadDataAsync(string url, IWebProxy webProxy, int downloadTimeout, Func<bool, string, Task> updateFunc)
+    public async Task<int> DownloadDataAsync(string url, IWebProxy webProxy, Func<bool, string, Task> updateFunc, CancellationToken cancellationToken = default)
     {
         try
         {
-            var progress = new Progress<string>();
-            progress.ProgressChanged += (sender, value) => updateFunc?.Invoke(false, $"{value}");
-
             await DownloaderHelper.Instance.DownloadDataAsync4Speed(webProxy,
                   url,
-                  progress,
-                  downloadTimeout);
+                  OnProgress,
+                  cancellationToken);
+
+            void OnProgress(string message)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+                updateFunc.Invoke(false, $"{message}");
+            }
+        }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
         }
         catch (Exception ex)
         {
-            await updateFunc?.Invoke(false, ex.Message);
+            await updateFunc.Invoke(false, ex.Message);
             if (ex.InnerException != null)
             {
-                await updateFunc?.Invoke(false, ex.InnerException.Message);
+                await updateFunc.Invoke(false, ex.InnerException.Message);
             }
         }
         return 0;
@@ -46,23 +53,28 @@ public class DownloadService
     /// <summary>
     /// Downloads a file and reports progress through events.
     /// </summary>
-    public async Task DownloadFileAsync(FileDownloadRequest request, bool blProxy, TimeSpan connectTimeout)
+    public async Task DownloadFileAsync(FileDownloadRequest request, bool blProxy, CancellationToken cancellationToken = default)
     {
         try
         {
             UpdateCompleted?.Invoke(this, new UpdateResult(false, $"{ResUI.Downloading}   {request.FileUrl}"));
 
-            var webProxy = await GetWebProxy(blProxy);
+            var webProxy = await GetWebProxy(blProxy, cancellationToken);
             await DownloaderHelper.Instance.DownloadFileAsync(webProxy,
                 request,
                 OnProgress,
-                connectTimeout);
+                cancellationToken);
 
             void OnProgress(FileDownloadState state)
             {
+                cancellationToken.ThrowIfCancellationRequested();
                 UpdateCompleted?.Invoke(this, new UpdateResult(state.Completed, $"{Utils.HumanFy((long)state.SpeedBytesPerSecond / 1024)}/s | {Utils.HumanFy(state.DownloadedBytes / 1024)}/{Utils.HumanFy(state.TotalBytes / 1024)}"));
             }
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch (Exception ex)
         {
             Logging.SaveLog(_tag, ex);
@@ -75,20 +87,21 @@ public class DownloadService
         }
     }
 
-    public async Task DownloadSmallFilesAsync(List<FileDownloadRequest> requests, bool blProxy, TimeSpan connectTimeout)
+    public async Task DownloadSmallFilesAsync(List<FileDownloadRequest> requests, bool blProxy, CancellationToken cancellationToken = default)
     {
         try
         {
             UpdateCompleted?.Invoke(this, new UpdateResult(false, $"{ResUI.Downloading} 0/{requests.Count}"));
 
-            var webProxy = await GetWebProxy(blProxy);
+            var webProxy = await GetWebProxy(blProxy, cancellationToken);
             await DownloaderHelper.Instance.DownloadSmallFilesAsync(webProxy,
                 requests,
                 OnProgress,
-                connectTimeout);
+                cancellationToken);
 
             void OnProgress(ReadOnlyMemory<FileDownloadState> states)
             {
+                cancellationToken.ThrowIfCancellationRequested();
                 var span = states.Span;
                 var completedCount = 0;
                 var downloadingStates = new List<FileDownloadState>();
@@ -129,6 +142,10 @@ public class DownloadService
                 UpdateCompleted?.Invoke(this, new UpdateResult(allCompleted, $"{completedCount}/{span.Length} | {Utils.HumanFy((long)totalSpeed / 1024)}/s {Utils.HumanFy(totalDownloadedBytes / 1024)}/{Utils.HumanFy(totalTotalBytes / 1024)} {downloadingFileName}"));
             }
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch (Exception ex)
         {
             Logging.SaveLog(_tag, ex);
@@ -144,12 +161,12 @@ public class DownloadService
     /// <summary>
     /// Gets redirect target URL without following redirects automatically.
     /// </summary>
-    public async Task<string?> UrlRedirectAsync(string url, bool blProxy)
+    public async Task<string?> UrlRedirectAsync(string url, bool blProxy, CancellationToken cancellationToken = default)
     {
         var webRequestHandler = new SocketsHttpHandler
         {
             AllowAutoRedirect = false,
-            Proxy = await GetWebProxy(blProxy)
+            Proxy = await GetWebProxy(blProxy, cancellationToken)
         };
         var certificateChainPolicy = CertPemManager.Instance.BuildCertificateChainPolicy();
         if (certificateChainPolicy != null)
@@ -159,7 +176,7 @@ public class DownloadService
         }
         using var client = new HttpClient(webRequestHandler);
 
-        var response = await client.GetAsync(url);
+        var response = await client.GetAsync(url, cancellationToken);
         if (response.StatusCode == HttpStatusCode.Redirect && response.Headers.Location is not null)
         {
             return response.Headers.Location.ToString();
@@ -175,26 +192,29 @@ public class DownloadService
     /// <summary>
     /// Tries to download string content using proxy switch setting.
     /// </summary>
-    public async Task<string?> TryDownloadString(string url, bool blProxy, string userAgent)
+    public async Task<string?> TryDownloadString(string url, bool blProxy, string userAgent, CancellationToken cancellationToken = default)
     {
-        var webProxy = await GetWebProxy(blProxy);
-        return await TryDownloadString(url, webProxy, userAgent);
+        var webProxy = await GetWebProxy(blProxy, cancellationToken);
+        return await TryDownloadString(url, webProxy, userAgent, cancellationToken);
     }
 
     /// <summary>
     /// Tries to download string content with a specified proxy.
     /// </summary>
-    public async Task<string?> TryDownloadString(string url, IWebProxy? webProxy, string userAgent)
+    public async Task<string?> TryDownloadString(string url, IWebProxy? webProxy, string userAgent, CancellationToken cancellationToken = default)
     {
-        var timeout = 15;
         try
         {
-            var result1 = await DownloadStringAsync(url, webProxy, userAgent, timeout);
+            var result1 = await DownloadStringAsync(url, webProxy, userAgent, cancellationToken);
             if (result1.IsNotEmpty())
             {
                 return result1;
             }
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch (Exception ex)
         {
             Logging.SaveLog(_tag, ex);
@@ -207,12 +227,16 @@ public class DownloadService
 
         try
         {
-            var result2 = await DownloadStringViaDownloader(url, webProxy, userAgent, timeout);
+            var result2 = await DownloadStringViaDownloader(url, webProxy, userAgent, cancellationToken);
             if (result2.IsNotEmpty())
             {
                 return result2;
             }
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch (Exception ex)
         {
             Logging.SaveLog(_tag, ex);
@@ -229,17 +253,16 @@ public class DownloadService
     /// <summary>
     /// Downloads string content via HttpClient.
     /// </summary>
-    private async Task<string?> DownloadStringAsync(string url, IWebProxy? webProxy, string userAgent, int timeout)
+    private async Task<string?> DownloadStringAsync(string url, IWebProxy? webProxy, string userAgent, CancellationToken cancellationToken = default)
     {
         try
         {
-            var connectTimeout = Math.Clamp(timeout / 5, 2, 5);
             var handler = new SocketsHttpHandler
             {
                 Proxy = webProxy,
                 UseProxy = webProxy != null,
                 AutomaticDecompression = DecompressionMethods.All,
-                ConnectTimeout = TimeSpan.FromSeconds(connectTimeout)
+                ConnectTimeout = webProxy is null ? Global.DirectDownloadConnect : Global.ProxyDownloadConnect,
             };
             var certificateChainPolicy = CertPemManager.Instance.BuildCertificateChainPolicy();
             if (certificateChainPolicy != null)
@@ -248,10 +271,8 @@ public class DownloadService
                 handler.SslOptions.RemoteCertificateValidationCallback = null;
             }
 
-            using var client = new HttpClient(HttpRequestHeadersHelper.CreateHandler(handler, RequestHeaders))
-            {
-                Timeout = Timeout.InfiniteTimeSpan
-            };
+            using var client = new HttpClient(HttpRequestHeadersHelper.CreateHandler(handler, RequestHeaders));
+            client.Timeout = Timeout.InfiniteTimeSpan;
 
             if (userAgent.IsNullOrEmpty())
             {
@@ -270,10 +291,15 @@ public class DownloadService
                 client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Utils.Base64Encode(uri.UserInfo));
             }
 
-            using var cts = new CancellationTokenSource();
-            cts.CancelAfter(TimeSpan.FromSeconds(timeout));
+            using var timeoutCts = new CancellationTokenSource();
+            timeoutCts.CancelAfter(webProxy is null ? Global.DirectFetch : Global.ProxyFetch);
+            using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, timeoutCts.Token);
 
-            return await client.GetStringAsync(url, cts.Token);
+            return await client.GetStringAsync(url, linkedCts.Token);
+        }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
         }
         catch (Exception ex)
         {
@@ -291,7 +317,7 @@ public class DownloadService
     /// <summary>
     /// Downloads string content via DownloaderHelper.
     /// </summary>
-    private async Task<string?> DownloadStringViaDownloader(string url, IWebProxy? webProxy, string userAgent, int timeout)
+    private async Task<string?> DownloadStringViaDownloader(string url, IWebProxy? webProxy, string userAgent, CancellationToken cancellationToken = default)
     {
         try
         {
@@ -299,9 +325,13 @@ public class DownloadService
             {
                 userAgent = Utils.GetVersion(false);
             }
-            var result = await DownloaderHelper.Instance.DownloadStringAsync(webProxy, url, userAgent, timeout, RequestHeaders, AcceptHeader);
+            var result = await DownloaderHelper.Instance.DownloadStringAsync(webProxy, url, userAgent, RequestHeaders, AcceptHeader, cancellationToken);
             return result;
         }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            throw;
+        }
         catch (Exception ex)
         {
             Logging.SaveLog(_tag, ex);
@@ -317,14 +347,14 @@ public class DownloadService
     /// <summary>
     /// Creates local SOCKS proxy when proxy switch is enabled.
     /// </summary>
-    private async Task<WebProxy?> GetWebProxy(bool blProxy)
+    private async Task<WebProxy?> GetWebProxy(bool blProxy, CancellationToken cancellationToken = default)
     {
         if (!blProxy)
         {
             return null;
         }
         var port = AppManager.Instance.GetLocalPort(EInboundProtocol.socks);
-        if (await SocketCheck(Global.Loopback, port) == false)
+        if (await SocksPortCheck(Global.Loopback, port, cancellationToken) == false)
         {
             return null;
         }
@@ -335,18 +365,64 @@ public class DownloadService
     /// <summary>
     /// Checks whether the specified TCP endpoint is reachable.
     /// </summary>
-    private async Task<bool> SocketCheck(string ip, int port)
+    private async Task<bool> SocksPortCheck(string ip, int port, CancellationToken cancellationToken = default)
     {
-        try
+        using var rootTimeOutCts = new CancellationTokenSource(Global.LocalFetch);
+        using var rootCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, rootTimeOutCts.Token);
+        var rootToken = rootCts.Token;
+
+        // SOCKS5 client greeting: VER=5, NMETHODS=1, METHOD=0x00 (no auth)
+        ReadOnlyMemory<byte> greeting = new byte[] { 0x05, 0x01, 0x00 };
+        var buf = new byte[2];
+
+        while (!rootToken.IsCancellationRequested)
         {
-            IPEndPoint point = new(IPAddress.Parse(ip), port);
-            using Socket? sock = new(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
-            await sock.ConnectAsync(point);
-            return true;
-        }
-        catch (Exception)
-        {
-            return false;
+            using var tcp = new TcpClient();
+            using var attemptCts = new CancellationTokenSource(TimeSpan.FromMilliseconds(50));
+            using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(rootToken, attemptCts.Token);
+            var linkedToken = linkedCts.Token;
+            try
+            {
+                await tcp.ConnectAsync(ip, port, linkedToken);
+                var stream = tcp.GetStream();
+
+                await stream.WriteAsync(greeting, linkedToken);
+
+                var read = await stream.ReadAsync(buf.AsMemory(0, 2), linkedToken);
+
+                // Server selection: VER=5, METHOD=0x00 — proxy is fully ready
+                if (read == 2 && buf[0] == 0x05)
+                {
+                    return true;
+                }
+            }
+            catch (OperationCanceledException)
+            {
+                if (!rootToken.IsCancellationRequested)
+                {
+                    continue;
+                }
+                Logging.SaveLog($"SocksPortCheck Timeout waiting for proxy port {port} to be ready.");
+                return false;
+            }
+            catch (SocketException ex) when (ex.SocketErrorCode == SocketError.ConnectionRefused)
+            {
+                // Connection refused, proxy not ready yet, wait 50ms before retrying
+                try
+                {
+                    await Task.Delay(50, rootToken);
+                }
+                catch (OperationCanceledException)
+                {
+                    Logging.SaveLog($"SocksPortCheck Timeout waiting for proxy port {port} to be ready.");
+                    return false;
+                }
+            }
+            catch
+            {
+                // Ignore other exceptions and continue
+            }
         }
+        return false;
     }
 }
diff --git a/v2rayN/ServiceLib/Services/SpeedtestService.cs b/v2rayN/ServiceLib/Services/SpeedtestService.cs
index af0a5d04..84d2ecf8 100644
--- a/v2rayN/ServiceLib/Services/SpeedtestService.cs
+++ b/v2rayN/ServiceLib/Services/SpeedtestService.cs
@@ -7,63 +7,117 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
     private static readonly string _tag = "SpeedtestService";
     private readonly Config? _config = config;
     private readonly Func<SpeedTestResult, Task>? _updateFunc = updateFunc;
-    private static readonly ConcurrentBag<string> _lstExitLoop = [];
+    private readonly Lock _runLock = new();
+    private CancellationTokenSource? _runCts;
     private readonly int _speedTestPageSize = config.SpeedTestItem.SpeedTestPageSize ?? Global.SpeedTestPageSize;
     private readonly TimeSpan _delayInterval = TimeSpan.FromSeconds(config.SpeedTestItem.SpeedTestDelayInterval ?? 1);
 
-    public void RunLoop(ESpeedActionType actionType, List<ProfileItem> selecteds)
+    public Task RunLoop(ESpeedActionType actionType, List<ProfileItem> selecteds, CancellationToken ct = default)
     {
-        Task.Run(async () =>
+        CancellationTokenSource runCts;
+
+        lock (_runLock)
         {
-            await RunAsync(actionType, selecteds);
-            await ProfileExManager.Instance.SaveTo();
-            await UpdateFunc("", ResUI.SpeedtestingCompleted);
-        });
+            _runCts?.Cancel();
+
+            runCts = CancellationTokenSource.CreateLinkedTokenSource(ct);
+
+            _runCts = runCts;
+        }
+
+        return RunLoopAsync(actionType, selecteds, runCts);
     }
 
     public void ExitLoop()
     {
-        if (!_lstExitLoop.IsEmpty)
+        CancellationTokenSource? runCts;
+
+        lock (_runLock)
+        {
+            runCts = _runCts;
+        }
+
+        if (runCts is not null)
         {
             _ = UpdateFunc("", ResUI.SpeedtestingStop);
-
-            _lstExitLoop.Clear();
+            runCts.Cancel();
         }
     }
 
-    private static bool ShouldStopTest(string exitLoopKey)
+    private async Task RunLoopAsync(ESpeedActionType actionType, List<ProfileItem> selecteds, CancellationTokenSource runCts)
     {
-        return _lstExitLoop.All(p => p != exitLoopKey);
-    }
-
-    private async Task RunAsync(ESpeedActionType actionType, List<ProfileItem> selecteds)
-    {
-        var exitLoopKey = Utils.GetGuid(false);
-        _lstExitLoop.Add(exitLoopKey);
-
-        var lstSelected = await GetClearItem(actionType, selecteds);
-
-        switch (actionType)
+        try
         {
-            case ESpeedActionType.Tcping:
-                await RunTcpingAsync(lstSelected, exitLoopKey);
-                break;
+            await RunAsync(actionType, selecteds, runCts.Token);
+        }
+        catch (OperationCanceledException) when (runCts.IsCancellationRequested)
+        {
+            // Ignored
+        }
+        finally
+        {
+            try
+            {
+                await ProfileExManager.Instance.SaveTo();
+            }
+            finally
+            {
+                await UpdateFunc("", ResUI.SpeedtestingCompleted);
+            }
 
-            case ESpeedActionType.Realping:
-                await RunRealPingBatchAsync(lstSelected, exitLoopKey);
-                break;
+            lock (_runLock)
+            {
+                if (ReferenceEquals(_runCts, runCts))
+                {
+                    _runCts = null;
+                }
+            }
 
-            case ESpeedActionType.UdpTest:
-                await RunUdpTestBatchAsync(lstSelected, exitLoopKey);
-                break;
+            runCts.Dispose();
+        }
+    }
+    
+    private async Task RunAsync(ESpeedActionType actionType, List<ProfileItem> selecteds, CancellationToken ct = default)
+    {
+        var lstSelected = await GetClearItem(actionType, selecteds);
+        var completedIds = new ConcurrentDictionary<string, byte>();
 
-            case ESpeedActionType.Speedtest:
-                await RunMixedTestAsync(lstSelected, 1, true, exitLoopKey);
-                break;
+        try
+        {
+            switch (actionType)
+            {
+                case ESpeedActionType.Tcping:
+                    await RunTcpingAsync(lstSelected, completedIds, ct);
+                    break;
 
-            case ESpeedActionType.Mixedtest:
-                await RunMixedTestAsync(lstSelected, _config.SpeedTestItem.MixedConcurrencyCount, true, exitLoopKey);
-                break;
+                case ESpeedActionType.Realping:
+                    await RunRealPingBatchAsync(lstSelected, completedIds, 0, ct);
+                    break;
+
+                case ESpeedActionType.UdpTest:
+                    await RunUdpTestBatchAsync(lstSelected, completedIds, 0, ct);
+                    break;
+
+                case ESpeedActionType.Speedtest:
+                    await RunMixedTestAsync(lstSelected, completedIds, 1, true, ct);
+                    break;
+
+                case ESpeedActionType.Mixedtest:
+                    await RunMixedTestAsync(lstSelected, completedIds, _config.SpeedTestItem.MixedConcurrencyCount, true,
+                        ct);
+                    break;
+            }
+        }
+        catch (OperationCanceledException) when (ct.IsCancellationRequested)
+        {
+            _ = UpdateFunc("", ResUI.SpeedtestingStop);
+            await SetTestResultAsync(lstSelected.Where(it => !completedIds.ContainsKey(it.IndexId)).ToList(),
+                actionType, ResUI.SpeedtestingSkip).ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            Logging.SaveLog(_tag, ex);
+            _ = UpdateFunc("", ex.Message);
         }
     }
 
@@ -103,29 +157,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         }
 
         //clear test result
-        foreach (var it in lstSelected)
-        {
-            switch (actionType)
-            {
-                case ESpeedActionType.Tcping:
-                case ESpeedActionType.Realping:
-                case ESpeedActionType.UdpTest:
-                    await UpdateFunc(it.IndexId, ResUI.Speedtesting, "");
-                    ProfileExManager.Instance.SetTestDelay(it.IndexId, 0);
-                    break;
-
-                case ESpeedActionType.Speedtest:
-                    await UpdateFunc(it.IndexId, "", ResUI.SpeedtestingWait);
-                    ProfileExManager.Instance.SetTestSpeed(it.IndexId, 0);
-                    break;
-
-                case ESpeedActionType.Mixedtest:
-                    await UpdateFunc(it.IndexId, ResUI.Speedtesting, ResUI.SpeedtestingWait);
-                    ProfileExManager.Instance.SetTestDelay(it.IndexId, 0);
-                    ProfileExManager.Instance.SetTestSpeed(it.IndexId, 0);
-                    break;
-            }
-        }
+        await SetTestResultAsync(lstSelected, actionType, ResUI.Speedtesting).ConfigureAwait(false);
 
         if (lstSelected.Count > 1 && (actionType == ESpeedActionType.Speedtest || actionType == ESpeedActionType.Mixedtest))
         {
@@ -135,56 +167,68 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         return lstSelected;
     }
 
-    private async Task RunTcpingAsync(List<ServerTestItem> selecteds, string exitLoopKey)
+    private async Task SetTestResultAsync(List<ServerTestItem> lstSelected, ESpeedActionType actionType, string message)
+    {
+        foreach (var it in lstSelected)
+        {
+            switch (actionType)
+            {
+                case ESpeedActionType.Tcping:
+                case ESpeedActionType.Realping:
+                case ESpeedActionType.UdpTest:
+                    await UpdateFunc(it.IndexId, message, "");
+                    break;
+                case ESpeedActionType.Speedtest:
+                    await UpdateFunc(it.IndexId, "", message);
+                    break;
+                case ESpeedActionType.Mixedtest:
+                    await UpdateFunc(it.IndexId, message, message);
+                    break;
+            }
+        }
+    }
+
+    private async Task RunTcpingAsync(List<ServerTestItem> selecteds,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         var pageSize = Math.Min(selecteds.Count, _speedTestPageSize);
         var lstBatch = GetTestBatchItem(selecteds, pageSize);
 
         foreach (var lst in lstBatch)
         {
-            if (ShouldStopTest(exitLoopKey))
-            {
-                await UpdateFunc("", ResUI.SpeedtestingSkip);
-                return;
-            }
+            ct.ThrowIfCancellationRequested();
 
-            List<Task> tasks = [];
-
-            foreach (var it in lst)
+            var parallelOptions = new ParallelOptions
             {
-                if (ShouldStopTest(exitLoopKey))
+                CancellationToken = ct,
+            };
+
+            await Parallel.ForEachAsync(lst, parallelOptions, async (item, innerCt) =>
+            {
+                try
                 {
-                    return;
+                    var responseTime = await GetTcpingTime(item.Address, item.Port, innerCt);
+
+                    ProfileExManager.Instance.SetTestDelay(item.IndexId, responseTime);
+                    await UpdateFunc(item.IndexId, responseTime.ToString());
+                    completedIds.TryAdd(item.IndexId, 0);
                 }
-
-                tasks.Add(Task.Run(async () =>
+                catch (OperationCanceledException) when (ct.IsCancellationRequested)
                 {
-                    try
-                    {
-                        var responseTime = await GetTcpingTime(it.Address, it.Port);
+                    throw;
+                }
+                catch (Exception ex)
+                {
+                    Logging.SaveLog(_tag, ex);
+                }
+            });
 
-                        ProfileExManager.Instance.SetTestDelay(it.IndexId, responseTime);
-                        await UpdateFunc(it.IndexId, responseTime.ToString());
-                    }
-                    catch (Exception ex)
-                    {
-                        Logging.SaveLog(_tag, ex);
-                    }
-                }));
-            }
-
-            await Task.WhenAll(tasks);
-
-            if (ShouldStopTest(exitLoopKey))
-            {
-                return;
-            }
-
-            await Task.Delay(_delayInterval);
+            await Task.Delay(_delayInterval, ct);
         }
     }
 
-    private async Task RunRealPingBatchAsync(List<ServerTestItem> lstSelected, string exitLoopKey, int pageSize = 0)
+    private async Task RunRealPingBatchAsync(List<ServerTestItem> lstSelected,
+        ConcurrentDictionary<string, byte> completedIds, int pageSize = 0, CancellationToken ct = default)
     {
         if (pageSize <= 0)
         {
@@ -195,38 +239,35 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         List<ServerTestItem> lstFailed = [];
         foreach (var lst in lstTest)
         {
-            var ret = await RunRealPingAsync(lst, exitLoopKey);
+            var ret = await RunRealPingAsync(lst, completedIds, ct);
             if (ret == false)
             {
                 lstFailed.AddRange(lst);
             }
-            await Task.Delay(_delayInterval);
+            await Task.Delay(_delayInterval, ct);
         }
 
         //Retest the failed part
         var pageSizeNext = pageSize / 2;
         if (lstFailed.Count > 0 && pageSizeNext > 0)
         {
-            if (ShouldStopTest(exitLoopKey))
-            {
-                await UpdateFunc("", ResUI.SpeedtestingSkip);
-                return;
-            }
+            ct.ThrowIfCancellationRequested();
 
             await UpdateFunc("", string.Format(ResUI.SpeedtestingTestFailedPart, lstFailed.Count));
 
             if (pageSizeNext > _config.SpeedTestItem.MixedConcurrencyCount)
             {
-                await RunRealPingBatchAsync(lstFailed, exitLoopKey, pageSizeNext);
+                await RunRealPingBatchAsync(lstFailed, completedIds, pageSizeNext, ct);
             }
             else
             {
-                await RunMixedTestAsync(lstSelected, _config.SpeedTestItem.MixedConcurrencyCount, false, exitLoopKey);
+                await RunMixedTestAsync(lstSelected, completedIds, _config.SpeedTestItem.MixedConcurrencyCount, false, ct);
             }
         }
     }
 
-    private async Task<bool> RunRealPingAsync(List<ServerTestItem> selecteds, string exitLoopKey)
+    private async Task<bool> RunRealPingAsync(List<ServerTestItem> selecteds,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         ProcessService processService = null;
         try
@@ -236,28 +277,39 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
             {
                 return false;
             }
-            await Task.Delay(1000);
+            await Task.Delay(1000, ct);
 
-            List<Task> tasks = [];
-            foreach (var it in selecteds)
+            var parallelOptions = new ParallelOptions
+            {
+                CancellationToken = ct,
+            };
+
+            await Parallel.ForEachAsync(selecteds, parallelOptions, async (it, innerCt) =>
             {
                 if (!it.AllowTest)
                 {
                     await UpdateFunc(it.IndexId, ResUI.SpeedtestingSkip);
-                    continue;
+                    completedIds.TryAdd(it.IndexId, 0);
+                    return;
                 }
 
-                if (ShouldStopTest(exitLoopKey))
+                try
                 {
-                    return false;
+                    await DoRealPing(it, completedIds, innerCt);
                 }
-
-                tasks.Add(Task.Run(async () =>
+                catch (OperationCanceledException) when (ct.IsCancellationRequested)
                 {
-                    await DoRealPing(it);
-                }));
-            }
-            await Task.WhenAll(tasks);
+                    throw;
+                }
+                catch (Exception ex)
+                {
+                    Logging.SaveLog(_tag, ex);
+                }
+            });
+        }
+        catch (OperationCanceledException) when (ct.IsCancellationRequested)
+        {
+            throw;
         }
         catch (Exception ex)
         {
@@ -273,7 +325,8 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         return true;
     }
 
-    private async Task RunUdpTestBatchAsync(List<ServerTestItem> lstSelected, string exitLoopKey, int pageSize = 0)
+    private async Task RunUdpTestBatchAsync(List<ServerTestItem> lstSelected,
+        ConcurrentDictionary<string, byte> completedIds, int pageSize = 0, CancellationToken ct = default)
     {
         if (pageSize <= 0)
         {
@@ -284,30 +337,27 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         List<ServerTestItem> lstFailed = [];
         foreach (var lst in lstTest)
         {
-            var ret = await RunUdpTestAsync(lst, exitLoopKey);
+            var ret = await RunUdpTestAsync(lst, completedIds, ct);
             if (ret == false)
             {
                 lstFailed.AddRange(lst);
             }
-            await Task.Delay(_delayInterval);
+            await Task.Delay(_delayInterval, ct);
         }
 
         //Retest the failed part
         if (lstFailed.Count > 0)
         {
-            if (ShouldStopTest(exitLoopKey))
-            {
-                await UpdateFunc("", ResUI.SpeedtestingSkip);
-                return;
-            }
+            ct.ThrowIfCancellationRequested();
 
             await UpdateFunc("", string.Format(ResUI.SpeedtestingTestFailedPart, lstFailed.Count));
 
-            await RunUdpTestAsync(lstFailed, exitLoopKey);
+            await RunUdpTestAsync(lstFailed, completedIds, ct);
         }
     }
 
-    private async Task<bool> RunUdpTestAsync(List<ServerTestItem> selecteds, string exitLoopKey)
+    private async Task<bool> RunUdpTestAsync(List<ServerTestItem> selecteds,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         ProcessService processService = null;
         try
@@ -317,27 +367,39 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
             {
                 return false;
             }
-            await Task.Delay(1000);
+            await Task.Delay(1000, ct);
 
-            List<Task> tasks = [];
-            foreach (var it in selecteds)
+            var parallelOptions = new ParallelOptions
+            {
+                CancellationToken = ct,
+            };
+
+            await Parallel.ForEachAsync(selecteds, parallelOptions, async (it, innerCt) =>
             {
                 if (!it.AllowTest)
                 {
-                    continue;
+                    await UpdateFunc(it.IndexId, ResUI.SpeedtestingSkip);
+                    completedIds.TryAdd(it.IndexId, 0);
+                    return;
                 }
 
-                if (ShouldStopTest(exitLoopKey))
+                try
                 {
-                    return false;
+                    await DoUdpTest(it, completedIds, innerCt);
                 }
-
-                tasks.Add(Task.Run(async () =>
+                catch (OperationCanceledException) when (ct.IsCancellationRequested)
                 {
-                    await DoUdpTest(it);
-                }));
-            }
-            await Task.WhenAll(tasks);
+                    throw;
+                }
+                catch (Exception ex)
+                {
+                    Logging.SaveLog(_tag, ex);
+                }
+            });
+        }
+        catch (OperationCanceledException) when (ct.IsCancellationRequested)
+        {
+            throw;
         }
         catch (Exception ex)
         {
@@ -353,81 +415,77 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         return true;
     }
 
-    private async Task RunMixedTestAsync(List<ServerTestItem> selecteds, int concurrencyCount, bool blSpeedTest, string exitLoopKey)
+    private async Task RunMixedTestAsync(List<ServerTestItem> selecteds,
+        ConcurrentDictionary<string, byte> completedIds, int concurrencyCount, bool blSpeedTest,
+        CancellationToken ct = default)
     {
-        using var concurrencySemaphore = new SemaphoreSlim(concurrencyCount);
         var downloadHandle = new DownloadService();
-        List<Task> tasks = [];
-        foreach (var it in selecteds)
+
+        var parallelOptions = new ParallelOptions
         {
-            if (ShouldStopTest(exitLoopKey))
+            MaxDegreeOfParallelism = concurrencyCount,
+            CancellationToken = ct,
+        };
+
+        await Parallel.ForEachAsync(selecteds, parallelOptions, async (it, innerCt) =>
+        {
+            innerCt.ThrowIfCancellationRequested();
+
+            ProcessService processService = null;
+            try
             {
-                await UpdateFunc(it.IndexId, "", ResUI.SpeedtestingSkip);
-                continue;
+                processService = await CoreManager.Instance.LoadCoreConfigSpeedtest(it);
+                if (processService is null)
+                {
+                    await UpdateFunc(it.IndexId, "", ResUI.FailedToRunCore);
+                    return;
+                }
+
+                await Task.Delay(1000, innerCt);
+
+                var delay = await DoRealPing(it, completedIds, innerCt);
+                if (blSpeedTest)
+                {
+                    if (delay > 0)
+                    {
+                        await DoSpeedTest(downloadHandle, it, completedIds, innerCt);
+                    }
+                    else
+                    {
+                        await UpdateFunc(it.IndexId, "", ResUI.SpeedtestingSkip);
+                    }
+                }
             }
-            await concurrencySemaphore.WaitAsync();
-
-            tasks.Add(Task.Run(async () =>
+            catch (OperationCanceledException) when (ct.IsCancellationRequested)
             {
-                ProcessService processService = null;
-                try
+                throw;
+            }
+            catch (Exception ex)
+            {
+                Logging.SaveLog(_tag, ex);
+            }
+            finally
+            {
+                if (processService != null)
                 {
-                    processService = await CoreManager.Instance.LoadCoreConfigSpeedtest(it);
-                    if (processService is null)
-                    {
-                        await UpdateFunc(it.IndexId, "", ResUI.FailedToRunCore);
-                        return;
-                    }
-
-                    await Task.Delay(1000);
-
-                    var delay = await DoRealPing(it);
-                    if (blSpeedTest)
-                    {
-                        if (ShouldStopTest(exitLoopKey))
-                        {
-                            await UpdateFunc(it.IndexId, "", ResUI.SpeedtestingSkip);
-                            return;
-                        }
-
-                        if (delay > 0)
-                        {
-                            await DoSpeedTest(downloadHandle, it);
-                        }
-                        else
-                        {
-                            await UpdateFunc(it.IndexId, "", ResUI.SpeedtestingSkip);
-                        }
-                    }
+                    await processService.StopAsync();
                 }
-                catch (Exception ex)
-                {
-                    Logging.SaveLog(_tag, ex);
-                }
-                finally
-                {
-                    if (processService != null)
-                    {
-                        await processService?.StopAsync();
-                    }
-                    concurrencySemaphore.Release();
-                }
-            }));
-        }
-        await Task.WhenAll(tasks);
+            }
+        });
     }
 
-    private async Task<int> DoRealPing(ServerTestItem it)
+    private async Task<int> DoRealPing(ServerTestItem it,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         var webProxy = new WebProxy($"socks5://{Global.Loopback}:{it.Port}");
-        var responseTime = await ConnectionHandler.GetRealPingTime(webProxy);
+        var responseTime = await ConnectionHandler.GetRealPingTime(webProxy, ct);
 
         ProfileExManager.Instance.SetTestDelay(it.IndexId, responseTime);
         await UpdateFunc(it.IndexId, responseTime.ToString());
 
         if (!_config.UiItem.HideColumnIpInfo && responseTime > 0)
         {
-            var ipInfo = await ConnectionHandler.GetIPInfo(webProxy);
+            var ipInfo = await ConnectionHandler.GetIPInfo(webProxy, ct);
             var ipStr = ipInfo?.ToString() ?? Global.None;
             ProfileExManager.Instance.SetTestIpInfo(it.IndexId, ipStr);
             await UpdateIpInfoFunc(it.IndexId, ipStr);
@@ -437,17 +495,22 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
             await UpdateIpInfoFunc(it.IndexId, ResUI.SpeedtestingSkip);
         }
 
+        completedIds.TryAdd(it.IndexId, 0);
         return responseTime;
     }
 
-    private async Task DoSpeedTest(DownloadService downloadHandle, ServerTestItem it)
+    private async Task DoSpeedTest(DownloadService downloadHandle, ServerTestItem it,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         await UpdateFunc(it.IndexId, "", ResUI.Speedtesting);
 
         var webProxy = new WebProxy($"socks5://{Global.Loopback}:{it.Port}");
         var url = _config.SpeedTestItem.SpeedTestUrl;
         var timeout = _config.SpeedTestItem.SpeedTestTimeout;
-        await downloadHandle.DownloadDataAsync(url, webProxy, timeout, async (success, msg) =>
+        using var timeoutCts = new CancellationTokenSource(TimeSpan.FromSeconds(timeout));
+        using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(ct, timeoutCts.Token);
+        var linkedCt = linkedCts.Token;
+        await downloadHandle.DownloadDataAsync(url, webProxy, async (success, msg) =>
         {
             decimal.TryParse(msg, out var dec);
             if (dec > 0)
@@ -455,34 +518,34 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
                 ProfileExManager.Instance.SetTestSpeed(it.IndexId, dec);
             }
             await UpdateFunc(it.IndexId, "", msg);
-        });
+        }, linkedCt);
+        completedIds.TryAdd(it.IndexId, 0);
     }
 
-    private async Task<int> DoUdpTest(ServerTestItem it)
+    private async Task<int> DoUdpTest(ServerTestItem it,
+        ConcurrentDictionary<string, byte> completedIds, CancellationToken ct = default)
     {
         var udpService = UdpTestService.CreateFromTarget(_config?.SpeedTestItem.UdpTestTarget, out var udpTestUrl);
-        var responseTime = -1;
-        try
-        {
-            responseTime = (int)(await udpService.SendUdpRequestAsync(udpTestUrl, it.Port, TimeSpan.FromSeconds(5))).TotalMilliseconds;
-        }
-        catch
-        {
-            // ignored
-        }
+        var responseTime = (int)(await udpService.SendUdpRequestAsync(udpTestUrl, it.Port, ct)).TotalMilliseconds;
 
         ProfileExManager.Instance.SetTestDelay(it.IndexId, responseTime);
         await UpdateFunc(it.IndexId, responseTime.ToString());
+        completedIds.TryAdd(it.IndexId, 0);
         return responseTime;
     }
 
-    private async Task<int> GetTcpingTime(string url, int port)
+    private async Task<int> GetTcpingTime(string? url, int port, CancellationToken ct = default)
     {
         var responseTime = -1;
 
+        if (url.IsNullOrEmpty() || port <= 0)
+        {
+            return responseTime;
+        }
+
         if (!IPAddress.TryParse(url, out var ipAddress))
         {
-            var ipHostInfo = await Dns.GetHostEntryAsync(url);
+            var ipHostInfo = await Dns.GetHostEntryAsync(url, ct);
             ipAddress = ipHostInfo.AddressList.First();
         }
 
@@ -492,13 +555,11 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         var timer = Stopwatch.StartNew();
         try
         {
-            using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
-            await clientSocket.ConnectAsync(endPoint, cts.Token).ConfigureAwait(false);
+            using var timeoutCts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+            using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(ct, timeoutCts.Token);
+            await clientSocket.ConnectAsync(endPoint, linkedCts.Token).ConfigureAwait(false);
             responseTime = (int)timer.ElapsedMilliseconds;
         }
-        catch (OperationCanceledException)
-        {
-        }
         finally
         {
             timer.Stop();
diff --git a/v2rayN/ServiceLib/Services/UpdateService.cs b/v2rayN/ServiceLib/Services/UpdateService.cs
index 42eb37ac..a1180f4f 100644
--- a/v2rayN/ServiceLib/Services/UpdateService.cs
+++ b/v2rayN/ServiceLib/Services/UpdateService.cs
@@ -4,10 +4,9 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
 {
     private readonly Config? _config = config;
     private readonly Func<bool, string, Task>? _updateFunc = updateFunc;
-    private readonly int _timeout = 30;
     private static readonly string _tag = "UpdateService";
 
-    public async Task CheckUpdateGuiN(bool preRelease, bool blProxy = true)
+    public async Task CheckUpdateGuiN(bool preRelease, bool blProxy = true, CancellationToken cancellationToken = default)
     {
         var url = string.Empty;
         var fileName = string.Empty;
@@ -39,7 +38,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
 
             url = result.Url!;
             fileName = Utils.GetTempPath(Utils.GetGuid());
-            await downloadHandle.DownloadFileAsync(new() { FileUrl = url, FilePath = fileName }, blProxy, TimeSpan.FromSeconds(_timeout));
+            await downloadHandle.DownloadFileAsync(new() { FileUrl = url, FilePath = fileName }, blProxy, cancellationToken);
         }
         else
         {
@@ -47,7 +46,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         }
     }
 
-    public async Task CheckUpdateCore(ECoreType type, bool preRelease, bool blProxy = true)
+    public async Task CheckUpdateCore(ECoreType type, bool preRelease, bool blProxy = true, CancellationToken cancellationToken = default)
     {
         var url = string.Empty;
         var fileName = string.Empty;
@@ -89,7 +88,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
             url = result.Url!;
             var ext = url.Contains(".tar.gz") ? ".tar.gz" : Path.GetExtension(url);
             fileName = Utils.GetTempPath(Utils.GetGuid() + ext);
-            await downloadHandle.DownloadFileAsync(new() { FileUrl = url, FilePath = fileName }, blProxy, TimeSpan.FromSeconds(_timeout));
+            await downloadHandle.DownloadFileAsync(new() { FileUrl = url, FilePath = fileName }, blProxy, cancellationToken);
         }
         else
         {
@@ -100,7 +99,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         }
     }
 
-    public async Task<UpdateResult> CheckHasUpdateOnly(ECoreType type, bool preRelease, bool blProxy = true)
+    public async Task<UpdateResult> CheckHasUpdateOnly(ECoreType type, bool preRelease, bool blProxy = true, CancellationToken cancellationToken = default)
     {
         if (!CoreInfoManager.Instance.IsCheckUpdateSupported(type))
         {
@@ -109,10 +108,10 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
 
         var downloadHandle = new DownloadService();
         var checkPreRelease = CoreInfoManager.Instance.GetCheckPreRelease(type, preRelease);
-        return await CheckUpdateAsync(downloadHandle, type, checkPreRelease, blProxy);
+        return await CheckUpdateAsync(downloadHandle, type, checkPreRelease, blProxy, cancellationToken);
     }
 
-    public async Task<List<string>> CheckHasUpdateOnlyAll(bool preRelease, bool blProxy = true)
+    public async Task<List<string>> CheckHasUpdateOnlyAll(bool preRelease, bool blProxy = true, CancellationToken cancellationToken = default)
     {
         var msgs = new List<string>();
         foreach (var type in CoreInfoManager.Instance.GetCheckUpdateCoreTypes())
@@ -122,7 +121,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
                 continue;
             }
 
-            var result = await CheckHasUpdateOnly(type, preRelease, blProxy);
+            var result = await CheckHasUpdateOnly(type, preRelease, blProxy, cancellationToken);
             if (result.Success && result.Version != null)
             {
                 var msg = string.Format(ResUI.MsgCheckUpdateHasNewVersion, type, result.Version);
@@ -137,7 +136,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         return msgs;
     }
 
-    public async Task UpdateGeoFileAll(bool blProxy = true)
+    public async Task UpdateGeoFileAll(bool blProxy = true, CancellationToken cancellationToken = default)
     {
         var requests = new List<FileDownloadRequest>();
         requests.AddRange(GetGeoFilesRequest());
@@ -145,22 +144,22 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         requests.AddRange(await GetSrsFileAllRequest());
         // NOTE: srs files are more small, so we reverse the order to ensure a good download experience for the user.
         requests.Reverse();
-        await DownloadGeoFiles(requests, blProxy);
+        await DownloadGeoFiles(requests, blProxy, cancellationToken);
         await UpdateFunc(true, string.Format(ResUI.MsgDownloadGeoFileSuccessfully, "geo"));
     }
 
     #region CheckUpdate private
 
-    private async Task<UpdateResult> CheckUpdateAsync(DownloadService downloadHandle, ECoreType type, bool preRelease, bool blProxy)
+    private async Task<UpdateResult> CheckUpdateAsync(DownloadService downloadHandle, ECoreType type, bool preRelease, bool blProxy, CancellationToken cancellationToken = default)
     {
         try
         {
-            var result = await GetRemoteVersion(downloadHandle, type, preRelease, blProxy);
+            var result = await GetRemoteVersion(downloadHandle, type, preRelease, blProxy, cancellationToken);
             if (!result.Success || result.Version is null)
             {
                 return result;
             }
-            return await ParseDownloadUrl(type, result);
+            return await ParseDownloadUrl(type, result, cancellationToken);
         }
         catch (Exception ex)
         {
@@ -170,14 +169,14 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         }
     }
 
-    private async Task<UpdateResult> GetRemoteVersion(DownloadService downloadHandle, ECoreType type, bool preRelease, bool blProxy)
+    private async Task<UpdateResult> GetRemoteVersion(DownloadService downloadHandle, ECoreType type, bool preRelease, bool blProxy, CancellationToken cancellationToken = default)
     {
         var coreInfo = CoreInfoManager.Instance.GetCoreInfo(type);
         var tagName = string.Empty;
         if (preRelease || coreInfo?.LockedMaxVersion != null)
         {
             var url = coreInfo?.ReleaseApiUrl;
-            var result = await downloadHandle.TryDownloadString(url, blProxy, Global.AppName);
+            var result = await downloadHandle.TryDownloadString(url, blProxy, Global.AppName, cancellationToken);
             if (result.IsNullOrEmpty())
             {
                 return new UpdateResult(false, "");
@@ -209,7 +208,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         else
         {
             var url = Path.Combine(coreInfo.Url, "latest");
-            var lastUrl = await downloadHandle.UrlRedirectAsync(url, blProxy);
+            var lastUrl = await downloadHandle.UrlRedirectAsync(url, blProxy, cancellationToken);
             if (lastUrl == null)
             {
                 return new UpdateResult(false, "");
@@ -223,7 +222,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
     [GeneratedRegex(@"v?(?<version>\d+\.\d+\.\d+(?:-[0-9a-zA-Z.-]+)?(?:\+[0-9a-zA-Z.-]+)?)", RegexOptions.IgnoreCase)]
     private static partial Regex SemVerRegex();
 
-    private async Task<SemanticVersion> GetCoreVersion(ECoreType type)
+    private async Task<SemanticVersion> GetCoreVersion(ECoreType type, CancellationToken cancellationToken = default)
     {
         try
         {
@@ -246,7 +245,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
                 return new SemanticVersion("");
             }
 
-            var result = await Utils.GetCliWrapOutput(filePath, coreInfo.VersionArg);
+            var result = await Utils.GetCliWrapOutput(filePath, coreInfo.VersionArg, cancellationToken);
             var echo = result ?? "";
             var version = SemVerRegex().Match(echo).Groups["version"].Value;
             return new SemanticVersion(version);
@@ -259,7 +258,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         }
     }
 
-    private async Task<UpdateResult> ParseDownloadUrl(ECoreType type, UpdateResult result)
+    private async Task<UpdateResult> ParseDownloadUrl(ECoreType type, UpdateResult result, CancellationToken cancellationToken = default)
     {
         try
         {
@@ -276,7 +275,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
                 case ECoreType.v2fly_v5:
                 case ECoreType.mihomo:
                     {
-                        curVersion = await GetCoreVersion(type);
+                        curVersion = await GetCoreVersion(type, cancellationToken);
                         message = string.Format(ResUI.IsLatestCore, type, curVersion.ToStandardVersionString("v"));
                         url = string.Format(coreUrl, version);
                         break;
@@ -284,7 +283,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
 
                 case ECoreType.sing_box:
                     {
-                        curVersion = await GetCoreVersion(type);
+                        curVersion = await GetCoreVersion(type, cancellationToken);
                         message = string.Format(ResUI.IsLatestCore, type, curVersion.ToStandardVersionString("v"));
                         url = string.Format(coreUrl, version, version.ToString().RemovePrefix("v"));
                         break;
@@ -531,7 +530,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
         };
     }
 
-    private async Task DownloadGeoFiles(List<FileDownloadRequest> requests, bool blProxy)
+    private async Task DownloadGeoFiles(List<FileDownloadRequest> requests, bool blProxy, CancellationToken cancellationToken = default)
     {
         var tmpFilePathDict = new Dictionary<string, string>();
         var tmpFileRequests = new List<FileDownloadRequest>();
@@ -586,7 +585,7 @@ public partial class UpdateService(Config config, Func<bool, string, Task> updat
             _ = UpdateFunc(false, args.GetException().Message);
         };
 
-        await downloadHandle.DownloadSmallFilesAsync(tmpFileRequests, blProxy, TimeSpan.FromSeconds(_timeout));
+        await downloadHandle.DownloadSmallFilesAsync(tmpFileRequests, blProxy, cancellationToken);
     }
 
     #endregion Geo private