Array direct assignment vs push

JavaScript performance comparison

Revision 65 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var array = [];
};
</script>

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Testing in unknown unknown
Test Ops/sec
Direct assignment
for(var i = 0; i < 100; i++)
{
  array[i] = "test";
}
pending…
Push
for(var i = 0; i < 100; i++)
{
  array.push("test");
}
pending…
Direct assignment (calculated)
for(var i = 0; i < 100; i++)
{
  array[array.length - 1] = "test";
}
pending…
Direct assignment (without calculation)
for(var i = 0; i < 100; i++)
{
  array[array.length] = "test";
}
pending…

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