Browser Diet - Cache Array Length

JavaScript performance comparison

Revision 3 of this test case created by Pablo Sanches

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Testing in unknown unknown
Test Ops/sec
Without cache
var arr = new Array(1000);
var lengthArr = arr.length;
for (var i = 0; i < lengthArr; i++) {
  // do something
}
pending…
With cache
var arr = new Array(1000);

for (var i = 0, len = arr.length; i < len; i++) {
  // do something
}
pending…

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