each vs map

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

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

Preparation code output

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Testing in unknown unknown
Test Ops/sec
map
var mappedArray = [1,2,3,4,5,6,7]
var b = mappedArray.map(function(element){
    return element*2;
})
pending…
each
var mappedArray = [1,2,3,4,5,6,7]
var i = 0;
$.each(mappedArray, function(){
   mappedArray[i] = this*2;
   i += 1;
})
pending…
forEach
var mappedArray = [1,2,3,4,5,6,7]
mappedArray.forEach(function(v, i){
   mappedArray[i] = v*2;
})
pending…

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