snippets/old_snippets/measuring-node-js-fn-performance.md

title	date	draft	snippet_types
measuring node.js function performance	2021-08-23T10:42:01+02:00	false	js node-js

How fast is that new function?

 import { xx } from 'xx';
+import { performance } from 'perf_hooks';
@@ -160,7 +161,10 @@ const userSessionMiddleware = async (req: XRequest, res: ExpressResponse, ne
+        var t0 = performance.now();
         req.isBot = headersIndicateBot(req.headers);
+        var t1 = performance.now();
+        console.log('Took', (t1 - t0).toFixed(4), 'milliseconds to calculate is bot');

source: https://www.sitepoint.com/measuring-javascript-functions-performance/