Adds perf metrics for each tRPC endpoint

packages/lib/server/defaultResponder.ts

@@ -8,9 +8,11 @@ type Handle<T> = (req: NextApiRequest, res: NextApiResponse) => Promise<T>;
 /** Allows us to get type inference from API handler responses */
 function defaultResponder<T>(f: Handle<T>) {
   return async (req: NextApiRequest, res: NextApiResponse) => {
+    let ok = false;
     try {
       performance.mark("Start");
       const result = await f(req, res);
+      ok = true;
       if (result) res.json(result);
     } catch (err) {
       const error = getServerErrorFromUnkown(err);
@@ -18,7 +20,7 @@ function defaultResponder<T>(f: Handle<T>) {
       res.json({ message: error.message });
     } finally {
       performance.mark("End");
-      performance.measure("Measuring endpoint: " + req.url, "Start", "End");
+      performance.measure(`[${ok ? "OK" : "ERROR"}][$1] ${req.method} '${req.url}'`, "Start", "End");
     }
   };
 }

packages/lib/server/perfObserver.ts

@@ -8,7 +8,8 @@ export const perfObserver =
   globalThis.perfObserver ||
   new PerformanceObserver((items) => {
     items.getEntries().forEach((entry) => {
-      console.log(entry); // fake call to our custom logging solution
+      // Log entry duration in seconds with four decimal places.
+      console.log(entry.name.replace("$1", `${(entry.duration / 1000.0).toFixed(4)}s`));
     });
   });