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Testing speed of a standard for loop vs. Array.indexOf.
<script>
var ar = [];
for (var i = 0; i < 249; i++)
{
ar[i] = 'asset!' + i;
}
</script>
"use strict";
Array.prototype.indexOf2 = function (x) {
for (let i = 0; i < this.length; i++) {
if (this[i] === x) return i;
}
return -1;
};
Array.prototype.indexOf3 = function (x) {
var i = this.length;
while(i--) {
if(this[i] === key) return i;
}
return -1;
};
Ready to run.
Test | Ops/sec | |
---|---|---|
For loop |
| ready |
while |
| ready |
indexOf |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.