Typed array iteration

JavaScript performance comparison

Revision 2 of this test case created by vjeux

Info

The test is more useful when the values are already set. On chrome, typed arrays are slower than normal arrays in this case!

Preparation code

<script>
  var classic = new Array(500);
 
  var unfixed = new Int8Array(); // Don't do this
  var fixed = new Int8Array(500);
 
  for (var i = 0; i < 500; ++i) {
   classic[i] = 0;
   unfixed[i] = 0;
   fixed[i] = 0;
  }
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Classic
for (var ii = 0; ii < 500; ++ii) {
 classic[ii] += 1;
}
pending…
Unfixed
for (var ii = 0; ii < 500; ++ii) {
 unfixed[ii] += 1;
}
pending…
Fixed
for (var ii = 0; ii < 500; ++ii) {
 fixed[ii] += 1;
}
pending…

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Revisions

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