Browser Diet - Cache Array Length

JavaScript performance comparison

Revision 14 of this test case created

Preparation code

  var arr = new Array(1000),
      len, i,c;

Test runner

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Testing in unknown unknown
Test Ops/sec
Without cache
for (i = 0; i < arr.length; i++) {
  // do something
  var c=arr[i];
With cache
for (i = 0, c; c=arr[i]; i++) {
  // do something

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