Metrics - BunDocumentation Index
Fetch the complete documentation index at: /docs/llms.txt
Use this file to discover all available pages before exploring further.
Skip to main contentBun home pageMonitor server activity with built-in metrics
const server = Bun.serve({
fetch(req, server) {
return new Response(
`Active requests: ${server.pendingRequests}\n` + `Active WebSockets: ${server.pendingWebSockets}`,
);
},
});
server.subscriberCount(topic)
Get count of subscribers for a WebSocket topic:
const server = Bun.serve({
fetch(req, server) {
const chatUsers = server.subscriberCount("chat");
return new Response(`${chatUsers} users in chat`);
},
websocket: {
message(ws) {
ws.subscribe("chat");
},
},
});
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- Monitor server activity with built-in metrics