object vs array perf

JavaScript performance comparison

Test case created

Preparation code

  var arr = [1, 2, 3];
  var obj = {
   'foo': true,
   'bar': true,
   'baz': true

Test runner

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Testing in unknown unknown
Test Ops/sec
array access
for (var i = 10000; i--;)
var v = arr[2];
obj access
for (var i = 10000; i--;)
var v = obj['foo'];

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