Math.abs vs custom abs function
JavaScript performance comparison
Preparation code
<script>
Benchmark.prototype.setup = function() {
int1 = 12345;
int2 = 12345;
float1 = 12345.67;
float2 = 12345.67;
abs = Math.abs;
};
</script>
Test runner
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Test  Ops/sec  

Math.abs 

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abs = Math.abs 

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* 1 

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minus 

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Revisions
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to the URL. Here’s a list of current revisions for this page:
 Revision 1: published
 Revision 2: published
 Revision 3: published by PetkaAntonov
 Revision 4: published
 Revision 5: published
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