Falsy test vs jQuery.noop

JavaScript performance comparison

Revision 2 of this test case created by thezilch

Info

This is a test to determine if using jQuery.noop in your code provides any performance benefit over a non-falsy test.

e.g.:

var optionalCallback = callback || function (){}; optionalCallback();

vs.

callback && callback();

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var x, jQ = {
   'noop': function() {}
  };
</script>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
falsy test
x && x();
pending…
jQuery.noop (local)
x = x || jQ.noop;
x();
pending…
jQuery.noop (real)
x = x || $.noop;
x();
pending…
function literal
x = x ||
function() {};
x();
pending…

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Revisions

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