Run results for: Comparing For vs For of vs ForEach

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0

Browser: Firefox 52

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

function GetId(){
	return Math.random().toString().slice(2, 10);
}

window.array = Array.from(new Array(10000)).map(GetId);

Tests:

For Loop
let res = ""; for(let i = 0; i < window.array.length; ++i){ res = window.array[i]; }
For of loop
let res = ""; for(let value of window.array){ res = value; }
ForEach loop
let res = ""; window.array.forEach(v => { res = v; })