Run results for: jQuery each vs pure JS

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser: Firefox 119

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
jQuery	1154824.6 Ops/sec
pure JS	1374907.1 Ops/sec
jQuery DIV	1141452.0 Ops/sec
pure JS DIV	185.6 Ops/sec

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

Script Preparation code:

//Add 100,000 elements
var frag = document.createDocumentFragment();
for (var i=0; i<10; i++){
  var outSection = document.createElement('section');
  outSection.id="secid_"+i;
  for (var j=0; j<100; j++){
    var midDiv = document.createElement('div');
    midDiv.id="mdivid_"+j;
    for (var k=0; k<100; k++){
      var inDiv = document.createElement('div');
      inDiv.id="divid_"+k;
      midDiv.appendChild(inDiv);
    }
    outSection.appendChild(midDiv)
  }
  frag.appendChild(outSection);
}
document.body.appendChild(frag);

Tests:

jQuery
var a = 0; $('section').each(function () { a++; });
pure JS
function forEachElement(selector, fn) { var elements = document.getElementsByTagName(selector); for (var i = 0; i < elements.length; i++) fn(elements[i]); } var a = 0; forEachElement('section', function (el){ a++; });
jQuery DIV
var a = 0; $('section').each(function () { a++; });
pure JS DIV
function forEachElement(selector, fn) { var elements = document.getElementsByTagName(selector); for (var i = 0; i < elements.length; i++) fn(elements[i]); } var a = 0; forEachElement('div', function (el){ a++; });

Run results for: jQuery each vs pure JS

Searching for tagName

jQuery

pure JS

jQuery DIV

pure JS DIV