jQuery 2.0.0 · jsPerf
Revisions You can edit these tests or add even more tests to this page by appending /edit to the URL. Revision 1: published Andreas Goebel on 2011-2-26 Revision 2: published RoVeRT on 2011-2-26 Revision 3: published Mathias Bynens on 2011-3-27 Revision 4: published on 2011-3-27 Revision 6: published on 2011-4-1 Revision 7: published on 2011-4-1 Revision 8: published jess jacobs on 2011-6-1 Revisio
"Type of undefined" vs "=== undefined" · jsPerf
JavaScript performance comparison Revision 6 of this test case created by Mihai Bazon on 2012-9-16 Preparation code <script> Benchmark.prototype.setup = function() { var a = 1, b = true, c = "c", d = [], e = {}, u; }; </script> Test runner Warning! For accurate results, please disable Firebug before running the tests. (Why?) Java applet disabled.
array.length vs. cached · jsPerf
JavaScript performance comparison Test case created by kazuho on 2012-7-2 Preparation code <script> Benchmark.prototype.setup = function() { var a = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]; a = a.concat(a, a, a, a, a, a, a, a); }; </script> Test runner Warning! For accurate results, please disable Firebug before running the tests. (Why?) Java applet disabled.
nextSibling vs childNodes · jsPerf
JavaScript performance comparison Test case created by Adrian Sutton on 2010-10-10 Preparation code <div id="container"> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> <p>Child</p> </div> <script> var container = document.getElementById('container'); function process(element) {} </script> Preparation code output <div id="contain
getElementById wrapper function · jsPerf
JavaScript performance comparison Test case created by azu on 2012-1-15 Preparation code <div> <div> <div> <div> <div id="target"> </div> </div> </div> </div> </div> <script> Benchmark.prototype.setup = function() { var $1 = document.getElementById.bind(document); var $2 = function(id) { return document.getElementById(id); }; var $3 = document.getElementById; }; </script> Preparation code output
insertAdjacentHTML · jsPerf
JavaScript performance comparison Test case created by on 2011-8-10 Preparation code <div id="work"></div> <script> var work = document.getElementById("work"); </script> <script> Benchmark.prototype.setup = function() { while (work.hasChildNodes()){ work.removeChild(work.firstChild); } }; </script> Preparation code output
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StringRepeat · jsPerf
cast-int · jsPerf
Array.indexOf vs Set.has · jsPerf
switch-if · jsPerf
Property Getter / Setter Techniques · jsPerf
loop increment decrement tests · jsPerf
push vs. [].length · jsPerf