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Comparing querySelectorAll performance with multiple ids vs getElementsByClassName performance with multiple classes.
<div>
<ul>
<li>
<a href="#" id="foo" name="name" class="foo">item 1</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 2</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 3</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 4</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 5</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 6</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 7</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 8</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 9</a>
</li>
<li>
<a href="#" id="foo" name="name" class="foo">item 10</a>
</li>
</ul>
</div>
<script>
var nodes;
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
getElementsByClassName |
| ready |
querySelectorAll (id) |
| ready |
querySelectorAll (class) |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.