Caching jquery selectors

JavaScript performance comparison

Revision 12 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>
    

Preparation code output

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

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Storing selector as variable
var element = $('.myElement');

for (var i = 0 ; i < 500 ; i++) {

element.css('color', 'green');
element.attr('title', 'My Element');
element.click(function() {
  console.log('clicked');
});

}
pending…
Creating selector every time
for (var i = 0 ; i < 500 ; i++) {

$('.myElement').css('color', 'green');
$('.myElement').attr('title', 'My Element');
$('.myElement').click(function() {
  console.log('clicked');
});

}
pending…
Chaining selectors
for (var i = 0 ; i < 500 ; i++) {

$('.myElement').css('color', 'green').attr('title', 'My Element').click(function() {
  console.log('clicked');
});

}
pending…
Iterating using each()
for (var i = 0 ; i < 500 ; i++) {

$('.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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