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.
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https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
Testing speed of a standard for loop vs. Array.indexOf.
<script>
var ar = [];
for(var i = 0; i < 1000; i++){
ar[i] = guid();
}
ar[500] = 'needle';
function guid() {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1);
}
return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
s4() + '-' + s4() + s4() + s4();
}
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
For loop |
| ready |
other for-loop |
| ready |
indexOf |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.