array filling speed

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var size = 10;
};
</script>

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Testing in unknown unknown
Test Ops/sec
[].push
var arr = [];

for ( var i = 0; i < size; i++ ) {
    arr.push(i);
}
pending…
[i] = i
var arr = [];

for ( var i = 0; i < size; i++ ) {
    arr[i] = i;
}
pending…
pre filled array
var arr = new Array(size);

for ( var i = 0; i < size; i++ ) {
    arr[i] = i;
}
pending…
[] with length pre-set
var arr = [];
arr.length = size;

for ( var i = 0; i < size; i++ ) {
    arr[i] = i;
}
pending…

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