Run results for: jquery.css vs getComputedStyle

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

getComputedStyle()

2.0M/s

getStyle2()

1.8M/s

getStyle()

1.4M/s

jQuery.css

964K/s

View exact numbers

Test name	Executions per second
✓ getComputedStyle()	1,969,226 Ops/sec
getStyle2()	1,814,624 Ops/sec
getStyle()	1,449,568 Ops/sec
jQuery.css	964,186 Ops/sec

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

<style>
  #wrap1 {
    width:300px;
    margin:10px;
    padding:10px;
    border:10px solid black;
  }

  #wrap2 {
    margin:10px;
    padding:10px;
    border:10px solid red;
  }

  #myDiv {
    margin:10px;
    padding:10px;
    border:10px solid blue;
  }
</style>

<div id="wrap1">
  <div id="wrap2">
    <div id="myDiv">
      Test
    </div>
  </div>
</div>

Script Preparation code:

  var myDiv = document.getElementById('myDiv');
  var $myDiv = $(myDiv);
var getStyle2;
  
  // getComputedStyle isn't compatible with all older browsers (notably IE),
  // so this is a wrapper function that works with those browsers.
  // From http://www.quirksmode.org/dom/getstyles.html
  function getStyle(el, styleProp) {
    if (el.currentStyle)
      var y = el.currentStyle[styleProp];
    else if (window.getComputedStyle)
      var y = document.defaultView.getComputedStyle(el,null).getPropertyValue(styleProp);
    return y;
  }

if (window.getComputedStyle) {
  getStyle2 = window.getComputedStyle;
} else {
  getStyle2 = function(el) {
      return el.currentStyle;
  }
}

Tests:

jQuery.css
var npaddingTop = $myDiv.css('padding-top');
getComputedStyle()
var npaddingTop = getComputedStyle(myDiv).paddingTop;
getStyle()
var npaddingTop = getStyle(myDiv, 'paddingTop');
getStyle2()
var npaddingTop = getStyle2(myDiv)['paddingTop'];