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Is it faster to use the native forEach or just loop with for?
Inspired by Adrian Sutton's tests at: http://www.symphonious.net/2010/10/09/javascript-performance-for-vs-foreach/
This one adds random floating point numbers to see if the loop overhead is significant at all in the face of standard work.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
var i,
key,
random,
array = [],
object = {},
sum = 0;
for (i = 0; i < 10000; i++) {
random = Math.random();
array[i] = random;
object[i] = random;
}
function add(val) {
sum += val;
}
i = 0;
array = [];
object = {};
sum = 0;
Ready to run.
Test | Ops/sec | |
---|---|---|
forEach |
| ready |
for loop, simple |
| ready |
for loop, reverse |
| ready |
for key in object |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.