some jquery selectors performance tests

JavaScript performance comparison

Revision 14 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<div id="a" class="a">
    <p class="d"></p>
    <div>
        <p class="d"></p>
    </div>
    <div>
        <div>
           <p class="d"></p>
        </div>
    </div>

    <div>
        <div>
            </div>
                <div>
                    <p class="d"></p>
                </div>
            </div>
        </div>
    </div>

</div>
<div>
    <div>
        </div>
            <div>
                <p class="d"></p>
            </div>
        </div>
    </div>
</div>
<div>
    <div>
        </div>
            <div>
                <p class="d"></p>
            </div>
        </div>
    </div>
</div>
<div>
    <div>
        </div>
            <div>
                <p class="d"></p>
            </div>
        </div>
    </div>
</div>


<script>
  $a_div = $('#a');
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
$('#a .d')
$('#a .d')
pending…
$('.d', $a_div)
$('.d', $a_div)
 
pending…
$a_div.find('.d')
$a_div.find('.d')
 
pending…
$('.a .d')
$('.a .d') 
pending…

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