Caching jquery selectors

JavaScript performance comparison

Revision 7 of this test case created by

Preparation code

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

Preparation code output

<div id=elements> <div class="myElement"> </div> <div class="myElement"> </div> <div class="myElement"> </div> <div class="myElement"> </div> <div class="myElement"> </div> </div>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Storing selector as variable
var element = $('#elements .myElement');
element.css('color', 'green');
element.attr('title', 'My Element');
element.click(function() {
  console.log('clicked');
});
pending…
Creating selector every time
$('#elements .myElement').css('color', 'green');
$('#elements .myElement').attr('title', 'My Element');
$('#elements .myElement').click(function() {
  console.log('clicked');
});
pending…
Chaining selectors
$('#elements .myElement').css('color', 'green').attr('title', 'My Element').click(function() {
  console.log('clicked');
});
pending…
Iterating using each()
$('#elements .myElement').each(function() {
  $(this).css('color', 'green');
  $(this).attr('title', 'My Element');
  $(this).click(function() {
    console.log('clicked');
  });
});
pending…

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Revisions

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