push vs assign length

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

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

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Testing in unknown unknown
Test Ops/sec
push
test = [];
for (var i = 0; i < 50000; i++) test.push(i);
 
pending…
assign length
test = [];
for (var i = 0; i < 50000; i++) test[test.length] = i;
pending…
Fixed length
test = [50000];
for (var i = 0; i < 50000; i++) test[i] = i;
pending…

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