get execution time js code example

Example 1: get execution time in javascript

var t0 = performance.now()

doSomething()   // <---- The function you're measuring time for 

var t1 = performance.now()
console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.")

Example 2: javascript time execution

var t0 = performance.now();

doSomething();   // <---- The function you're measuring time for 

var t1 = performance.now();
console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.");

Example 3: javascript time of execution

const { JSDOM } = require("jsdom");
const { window } = new JSDOM();
 
var start = window.performance.now();
 
// task starts
for (var i = 0; i < 100000000;i++);
// task ends
 
var end = window.performance.now();
console.log(`Execution time: ${end - start} ms`);