Run results for: For, While

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
For	3364.0 Ops/sec
While	3656.8 Ops/sec

HTML Preparation code:

<div id="container"></div>

AخA
 
<div id="container"></div>

Script Preparation code:

var node = document.getElementById('container');
for(var i = 0; i < 1000; i++) node.appendChild(document.createElement('div'));

 
var node = document.getElementById('container');for(var i = 0; i < 1000; i++) node.appendChild(document.createElement('div'));

Tests:

var items = document.querySelectorAll('#container > div');
let i = 0;
for (;items[i];) {
  i++;
}

 
var items = document.querySelectorAll('#container > div');let i = 0;for (;items[i];) {  i++;}

var items = document.querySelectorAll('#container > div');
let i = 0;
while (items[i]) {
  i++;
}

 
var items = document.querySelectorAll('#container > div');let i = 0;while (items[i]) {  i++;}