rwsdk/dist/vite/devServerTimingPlugin.mjs

Build fast, server-driven webapps on Cloudflare with SSR, RSC, and realtime

import debug from "debug";
const log = debug("rwsdk:vite:dev-server-timing-plugin");
export const devServerTimingPlugin = () => {
    const startTime = Date.now();
    let hasLoggedFirstResponse = false;
    return {
        name: "rwsdk:dev-server-timing",
        configureServer(server) {
            // context(justinvdm, 19 Nov 2025): This hook adds a middleware for
            // logging the time to first response. Unlike other plugins that must
            // run before the Cloudflare plugin to prevent startup deadlocks, its
            // execution order is not critical, so `enforce: 'pre'` is not needed.
            server.middlewares.use((_req, res, next) => {
                if (!hasLoggedFirstResponse) {
                    res.on("finish", () => {
                        if (!hasLoggedFirstResponse) {
                            hasLoggedFirstResponse = true;
                            const endTime = Date.now();
                            const duration = endTime - startTime;
                            log(`🚀 Dev server first response completed in ${duration}ms`);
                        }
                    });
                }
                next();
            });
        },
    };
};