jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.
jsperf.com URLs are mirrored at the same path, e.g:
https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
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/
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
var i,
value,
length,
values = [],
sum = 0,
context = values;
for (i = 0; i < 10000; i++) {
values[i] = i + 1;
}
function add(val) {
sum += val;
}
i = 0;
value = 0;
length = 0;
values = [];
sum = 0;
Ready to run.
Test | Ops/sec | |
---|---|---|
forEach |
| ready |
for loop, simple |
| ready |
for loop, cached length |
| ready |
for loop, reverse |
| ready |
for loop, cached length, callback |
| ready |
for loop, cached length, callback.call |
| ready |
$.each |
| ready |
for ... in |
| ready |
for loop, reverse, decrement condition |
| ready |
for loop, reverse, pre-decrement |
| ready |
for loop, assignment condition |
| ready |
for loop, assignment condition, reversed |
| ready |
for loop, assignment condition, callback |
| ready |
for loop, assignment condition, callback.call |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.