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
// Sane Summation
function saneSum(x) {
var sum = 0;
for (var j = 0; j < x; j++) {
for (var i = 0; i < j; i++) {
sum += i;
}
}
return sum;
}
// Opti Summation
function optiSum(x) {
x = x | 0;
var i = 0;
var sum = 0;
var j = 0;
for(j = 0; (j | 0) < (x | 0); j = ((j | 0) + 1) | 0) {
for(i = 0; (i | 0) < (j | 0); i = ((i | 0) + 1) | 0) {
sum = ((sum | 0) + (i | 0)) | 0;
}
}
return sum | 0;
}
function ASMModule(stdlib, foreign, heap) {
"use asm";
function asmOptiSum(x) {
x = x | 0;
var i = 0;
var sum = 0;
var j = 0;
for(j = 0; (j | 0) < (x | 0); j = ((j | 0) + 1) | 0) {
for(i = 0; (i | 0) < (j | 0); i = ((i | 0) + 1) | 0) {
sum = ((sum | 0) + (i | 0)) | 0;
}
}
return sum | 0;
}
return { asmOptiSum: asmOptiSum };
}
var module = ASMModule(globalThis, {}, new ArrayBuffer(0));Ready to run.
| Test | Ops/sec | |
|---|---|---|
| Normal, Sane Code | | ready |
| Chad, ASM.js Code | | ready |
| True ASM.js Code | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.