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Testing speed of a standard for loop vs. Array.indexOf.
<script>
var SIZE = 999;
var sparseArray = [];
var denseArray = [];
for (var i = 0; i < SIZE; ++i) {
var obj = {};
sparseArray[i] = obj;
denseArray.push(obj);
}
</script>
Array.prototype.indexOfRef = function(ref) {
for (var i = 0, _len = this.length; i < _len; ++i) {
if (this[i] === ref) {
return i;
}
}
return -1;
}
Ready to run.
Test | Ops/sec | |
---|---|---|
sparse-for-loop |
| ready |
sparse-indexOf |
| ready |
dense-for-loop |
| ready |
dense-indexOf |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.