$el.attr('id') vs $el.id

JavaScript performance comparison

Revision 9 of this test case created by Andrée

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<a id="tester1" class="tests" href="#">abcdefghijkl</a>
<a id="tester2" class="tests" href="#">abcdefghijkl</a>
<a id="tester3" class="tests" href="#">abcdefghijkl</a>
<a id="tester4" class="tests" href="#">abcdefghijkl</a>
<a id="tester5" class="tests" href="#">abcdefghijkl</a>
<a id="tester6" class="tests" href="#">abcdefghijkl</a>
<a id="tester7" class="tests" href="#">abcdefghijkl</a>
<a id="tester8" class="tests" href="#">abcdefghijkl</a>
<a id="tester9" class="tests" href="#">abcdefghijkl</a>
<a id="tester10" class="tests" href="#">abcdefghijkl</a>
<a id="tester11" class="tests" href="#">abcdefghijkl</a>
<a id="tester12" class="tests" href="#">abcdefghijkl</a>
<a id="tester13" class="tests" href="#">abcdefghijkl</a>
<a id="tester14" class="tests" href="#">abcdefghijkl</a>
<a id="tester15" class="tests" href="#">abcdefghijkl</a>
<a id="tester16" class="tests" href="#">abcdefghijkl</a>
<script>
  $a = $('.tests');
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
$(this).attr('id');
$a.each(function() {
  $t = $(this).attr('id');
});
pending…
this.id
$a.each(function() {
  $t = this.id;
});
pending…

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