Add startup performance metric

1 files changed, 11 insertions, 0 deletions

diff --git a/src/index.ts b/src/index.ts
index 0591e6d..30a6f34 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,7 @@
+import { performance } from "node:perf_hooks";
+
+performance.mark("startup-begin");
+
 import log from "loglevel";
 
 import { server, metricsServer } from "./app";
@@ -23,3 +27,10 @@ process.on("SIGINT", function () {
   served.stop();
   process.exit(0);
 });
+
+performance.mark("startup-end");
+
+performance.measure("startup", "startup-begin", "startup-end");
+for (const entry of performance.getEntriesByName("startup")) {
+  log.info(`Startup took ${entry.duration} ms`);
+}