Caching jquery selectors

JavaScript performance comparison

Revision 26 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div class="myElement">
<div class="child">

</div>
</div>
    

Preparation code output

<div class="myElement"> <div class="child"> </div> </div>

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
asd
document.getElementsByClassName('child').each(function() {
  var el = $(this);
  el.css('color', 'green');
  el.attr('title', 'My Element');
  el.click(function() {
    console.log('clicked');
  });
});
pending…
Creating selector every time
document.getElementsByClassName('child').each(function() {
  var el = $(this);
  el.css('color', 'green');
  el.attr('title', 'My Element');
  el.click(function() {
    console.log('clicked');
  });
});
pending…
Chaining selectors
var elements = document.getElementsByClassName('child');
for (var i = 0; i < elements.length; i++) {
var el = elements[i];
el.style.color = 'green';
  el.setAttribute('title', 'My Element');
  el.addEventListener("click", function() {
   console.log('clicked');
  });
}
pending…
Iterating using each()
$('.myElement').each(function() {
  var el = $(this);
  el.css('color', 'green');
  el.attr('title', 'My Element');
  el.click(function() {
    console.log('clicked');
  });
});
pending…

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Revisions

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