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
Varius for-loop variants: * with length caching * with various counter increment (++i, i++) * while alternative
var arr = [];
for (var i = 0; i < 1000; i++) {
arr.push('arr-value-' + i);
}
function worker() {
return (1 + 1);
}
Ready to run.
Test | Ops/sec | |
---|---|---|
classic for-loop |
| ready |
++i |
| ready |
caching length in loop |
| ready |
caching length outside loop |
| ready |
double caching length |
| ready |
while alternative i-- |
| ready |
while alternative --i |
| ready |
reverse iteration |
| ready |
caching length, start on -1 |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.