Array.prototype.slice.call() vs [].slice.call() nested

JavaScript performance comparison

Revision 25 of this test case created by Entoarox

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var items = [1, 2, 3, 4, 5],
      slice = Array.prototype.slice,
      _slice = [].slice,
  wslice = window.Array.prototype.slice;

function nonnative_slice(item, start){
  start = ~~start;
  var
    len = item.length, i, newArray;

  newArray = new Array(len - start);
  
  for (i = start; i < len; i++){
    newArray[i - start] = item[i];
  }
       
  return newArray;
}
Array.prototype.slice=nonnative_slice;
</script>
    

Preparation code output

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Array.prototype.slice
Array.prototype.slice.call( items )
pending…
[].slice
[].slice.call( items )
pending…
cached prototype
slice.call(items);
pending…
cached [].slice
_slice.call(items);
pending…
Array().slice
Array().slice.call(items);
pending…
window.Array
window.Array.prototype.slice.call(items);
pending…
wslice cached
wslice.call( items );
pending…
slice(0)
items.slice([0])
pending…
non native slice
nonnative_slice(items);
pending…

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Revisions

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