array.push vs array.unshift
JavaScript performance comparison
Preparation code
<script>
Benchmark.prototype.setup = function() {
var array = [1,2,3];
};
Benchmark.prototype.teardown = function() {
array = undefined;
};
</script>
Test runner
Warning! For accurate results, please disable Firebug before running the tests. (Why?)
Java applet disabled.
| Test | Ops/sec | |
|---|---|---|
array.push(0); |
|
pending… |
array.unshift(0); |
|
pending… |
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