javascript measure execution time code example

Example 1: time taken for a function javascript

console.time("timer");   //start time with name = timer
console.timeEnd("timer"); //end timer and log time difference

Example 2: Javascript measure function run time

var startTime = performance.now();

alert('Run some function here');

var endTime = performance.now();
var totalTime=endTime-startTime;// time took to run in milliseconds

alert('Total time:'+totalTime +'ms');

Example 3: javascript get current time

var today = new Date();
var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();

Example 4: 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 5: 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.");