forEach vs loop vs while

JavaScript performance comparison

Revision 66 of this test case created by

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  var arr = [];
  for(var i = 0; i < 1000000; i++) arr[i]=i;
  function nonStrictCallback(v) {v;}
  function strictCallback(v) {

    "use strict";
    v;
  }

        
  };


      
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
while 
var h = 0;
while (h < arr.length) { arr[++h];};
 pending…
While -- 
var l = arr.length;
while (l > 0) { arr[--l];};
 pending…
While if 
var l = arr.length;
while (1) { if(l>0){ arr[--l]; } else { break } };
 pending…
forEach 
arr.forEach(function(v) {v;});
 pending…
for loop 
for(var i = 0; i < arr.length; i++){arr[i];}
 pending…
for loop(cached) 
for(var i = 0, l = arr.length; i < l; i++){arr[i];}
 pending…

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