modulo vs bitwise

JavaScript performance comparison

Revision 10 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script src="//ajax.googleapis.com/ajax/libs/prototype/1/prototype.js">
</script>
<script src="//ajax.googleapis.com/ajax/libs/mootools/1.3/mootools-yui-compressed.js">
</script>
<script src="//ajax.googleapis.com/ajax/libs/yui/2.9.0/build/yuiloader/yuiloader-min.js">
</script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1/dojo/dojo.xd.js">
</script>
<script src="//ajax.googleapis.com/ajax/libs/ext-core/3/ext-core.js">
</script>
<script src="//www.cinsoft.net/mylib099-min.js">
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
modulo
// async test
for (var j = 0; j < 1000; j++) {
  if (j % 2 === 0) j = j;
}
pending…
bitwise
for (var j = 0; j < 1000; j++) {
  if ((j & 1) === 0) j = j;
}
pending…

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