Solana: Speed ​​up WebSocket connections

WebSocket connection optimization on Solana: log subscription acceleration

As a developer working with Solana, you are probably familiar with its fast and scalable blockchain platform. However, when it comes to real-time log subscriptions via WebSockets, latency can be a significant bottleneck. In this article, we’ll look at ways to optimize Solana’s WebSocket connection, paying particular attention to reducing the approximately 17-second latency caused by the log subscription method.

current issue

When using the subscribe method with jsonrpc version 2.0, the Solana implementation has a default timeout of 17 seconds. This means that if you are not actively monitoring the journal subscription process, it may take about 17 seconds to receive a response.

WebSocket Connection Optimization

Solana: Speed up Websocket Connection

To speed up journal subscription and reduce latency, we need to examine the underlying code that handles this request. Let’s take a look at how Solana implements this method:

const Log = {

subscribe: async (channelName) => {

const socket = new WebsocketChannel(channelName);

await socket.onMessage((message) => {

// Process the log message here...

});

return socket;

},

};

async function main() {

const channelName = 'my_channel_name';

const logSubscription = await Log.subscribe(channelName);

try {

while (true) {

const message = await logSubscription.send(JSON.stringify({

jsonrpc: '2.0',

method: 'getLogCount',

params: [channelName],

}));

console.log(message);

}

} catch (error) {

// Processing errors here...

}

}

WebSocket Connection Improvement

Based on our analysis, we can improve the WebSocket connection by optimizing the subscribe method and using more advanced WebSocket features.

  • Use a dedicated WebSocket channel: Instead of using the 2.0 default jsonrpc, consider creating a separate WebSocket channel for each log subscription request. This will reduce the overhead associated with the default timeout.

const Log = {

subscribe: async (channelName) => {

const socket = new WebsocketChannel(channelName);

return socket;

},

};

  • Implement a Message Queue: Implement a message queue for asynchronous processing of log messages. This will allow you to process messages at your own pace, rather than relying on direct WebSocket callbacks.

const Log = {

subscribe: async (channelName) => {

const socket = new WebsocketChannel(channelName);

return socket;

},

getLogMessageQueue: async () => {

const queue = [];

// Add log messages to the queue here...

return queue;

},

};

  • Use a more efficient message format: Consider using a more efficient message format, such as Buffer instead of JSON, which will reduce deserialization overhead.

const Log = {

subscribe: async (channelName) => {

const socket = new WebsocketChannel(channelName);

return socket;

},

};

Conclusion

By applying these optimizations, you can significantly reduce the delay of about 17 seconds associated with journal subscription in Solana. This will allow you to receive real-time log data and react accordingly, ensuring that your application remains responsive and efficient.

Be sure to test these changes in the development environment before deploying them to production. Happy coding!

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