Significant latency in high-frequency WebSocket communication with .NET Core 6 and SignalR
I'm refactoring my project and I'm experiencing substantial latency in WebSocket communication using SignalR with .NET Core 6. My application requires real-time updates for a financial trading platform, where every millisecond counts. However, I’ve noticed that the time taken for messages to travel from the client to the server and back is averaging around 200-300 ms, which is unacceptable for our use case. I’ve tested the connection across various network environments and used both development and production setups, but the latency remains consistent. To troubleshoot, I implemented a simple echo method in my SignalR hub: ```csharp public class TradeHub : Hub { public async Task<string> Echo(string message) { await Task.Delay(10); // Simulating processing time return message; } } ``` On the client side, I'm using React with the following code to initiate a connection and send messages: ```javascript const connection = new signalR.HubConnectionBuilder() .withUrl('/tradehub') .configureLogging(signalR.LogLevel.Information) .build(); connection.start() .then(() => { console.log('Connected'); setInterval(async () => { const response = await connection.invoke('Echo', 'Hello from client'); console.log('Response:', response); }, 100); }) .catch(err => console.error('Connection error:', err)); ``` In a controlled test, I set the message interval to 100 ms, but I can still see delays when logging the responses. I also enabled SignalR logging and noticed occasional warnings about connection interruptions, though I couldn’t pinpoint the exact cause. I've checked the server configuration, and I'm using the following settings in `Startup.cs`: ```csharp services.AddSignalR(options => { options.EnableDetailedErrors = true; }); ``` I've tried adjusting the server's WebSocket configuration by setting `KeepAliveInterval` and `ClientTimeoutInterval`, but that didn’t yield significant improvements. Additionally, I've validated that there are no unnecessary middleware or processing slowing down the requests. Given that this is a critical application, any insights into potential bottlenecks, configuration tweaks, or best practices for optimizing SignalR performance in .NET Core 6 would be greatly appreciated! The project is a desktop app built with C#. Any advice would be much appreciated. Any suggestions would be helpful.