cached/uncached length for loop

Benchmark created on

Preparation HTML

<script>
  var canvas = document.createElement('canvas');
  canvas.width = canvas.height = 500;
  var imageData = canvas.getContext('2d').getImageData(0, 0, canvas.width, canvas.height);
  var data = imageData.data;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
cached
for (var i = 0, len = data.length; i < len; i++) {
 data[i]
}
ready
uncached
for (var i = 0; i < data.length; i++) {
 data[i]
}
ready

Revisions

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