jQuery .live() vs .delegate() vs .on()

JavaScript performance comparison

Revision 10 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>

<div id="context">
<div><div><div><div><div><div><div><div>
<div class='nest'><p>Some paragraph</p></div>
<p>Some paragraph</p>
<p>Some paragraph</p>
<p>Some paragraph</p>
<div class='nest'><p>Some paragraph</p></div>
<p>Some paragraph</p>
<p>Some paragraph</p>
<p>Some paragraph</p>
<p>Some paragraph</p>
</div></div></div></div></div></div></div></div>
</div>

Preparation code output

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Some paragraph

Test runner

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Testing in unknown unknown
Test Ops/sec
.live()
$('p').live('click', $.noop);
pending…
.live() with context
$('p', $('#context')).live('click', $.noop);
pending…
.delegate()
$('#context').delegate('p', 'click', $.noop);
pending…
.delegate() on document
$(document).delegate('p', 'click', $.noop);
pending…
.on()
$(document).find('.nest').on('click', 'p', $.noop);
pending…
.on() on document
$(document).on('click', 'p', $.noop);
pending…
document .nest p
$(document).on('click', '.nest> p', $.noop);
pending…
#context .nest p
$('#context').on('click', '.nest> p', $.noop);
pending…
.nest p
$('.nest').on('click', 'p', $.noop);
pending…
document #context .nest p
$(document).on('click', '#context .nest> p', $.noop);
pending…

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