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
This is comparing the runtimes of [ ], substr, substring, and slice in a string for large (10000 character) string size.
<script>
var longString = "";
// Large = 10,000
for (var i = 0; i < 10000; i++) {
longString += i % 10;
}
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
Substring (long) |
| ready |
Substr (long) |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.