Sometimes you need to measure time execution of a script or part of it, simple answer could be call the Date() function many times and compute elapsed time.

Recently I found out a better method that works for javascript and Node.js too, the console.time.

This function comes from Web API and have a great support:

Using it is very simple:

//start timer with name "My Timer Name"
console.time("My Timer Name");

alert("Click to continue");
//log time without sotp the timer
console.timeLog("My Timer Name");
//My Timer Name: 1898.589111328125ms

alert("Click to continue again...");
//log time and stop timer
console.timeEnd("My Timer Name");
//My Timer Name: 2641.26123046875ms

For more information you can read official docs on MDN

Cover Image: Ansgar Koreng