id selector context

JavaScript performance comparison

Revision 282 of this test case created

Info

*** This version adds a suggestion from a comment in Revision 2 of this test

Comparing the performance difference of varied jQuery 1.7 selectors.

This test page contains some dummy HTML (from html-ipsum.com) just to give the page some weight, make the selectors work a little bit.

Note that the "Tag" selector is selecting a tag that happens to be unique in the page just to be fair.

Preparation code

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

<div class="container" id="containerid">
        <div class="main">
          <ul class="list-1">
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
          </ul>
       
          <ul class="list-2">
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
            <li class="odd">item</li>
            <li>item</li>
          </ul>
        </div>
 </div>

Preparation code output

  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item
  • item

Test runner

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Java applet disabled.

Testing in unknown unknown
Test Ops/sec
jQuery ID
$("#containerid .even");
pending…
jQuery ID with context
$(".even #containerid");
pending…
jQuery with find
$("#containerid").find(".even");
pending…
jQuery Selector class
$(".container .list-1 .even")
pending…
jQuery Selector class with find()
$(".container").find(".list-1").find(".even")
pending…
jQuery tagname
$("li .even");
pending…
jQuery tagname with find()
$("li").find(".even");
pending…
jQuery without Chaining
$("#containerid").addClass("active");
$("#containerid").css("color","#f0f");
$("#containerid").height(300);
pending…
jQuery with chaining
$("#containerid").addClass("active").css("color","#f0f").height(300);
pending…

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Revisions

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