How to calculate the execution time of an async function in JavaScript?

Question

I would like to calculate how long an async function (async/await) is taking in JavaScript.

One could do:

const asyncFunc =         


        

Answer 1

Consider using perfrmance.now() API

var time_0 = performance.now();
function();
var time_1 = performance.now();
console.log("Call to function took " + (time_1 - time_0) + " milliseconds.")

As performance.now() is the bare-bones version of console.time , it provide more accurate timings.