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
var nextTick1 = function () {
// Firefox doesn't support MessageChannel so we use something that works..
if (!('MessageChannel' in window)) {
return function(fn) { setTimeout(fn, 0) }
}
var channel = new MessageChannel();
var queue = [];
channel.port1.onmessage = function () {
queue.shift()();
};
function nextTick(fn) {
queue.push(fn);
channel.port2.postMessage();
}
return nextTick;
}();
var nextTick2 = function () {
function nextTick(fn) {
return setTimeout(fn, 0);
}
return nextTick;
}();
var nextTick3 = function () {
function nextTick(fn) {
var image = new Image();
image.onerror = fn;
image.src = 'data:,foo';
}
return nextTick;
}();
var nextTick4 = function () {
function nextTick(fn) {
var script = document.createElement('script');
script.onload = function() {
document.body.removeChild(script);
fn();
}
script.src = 'data:text/javascript,';
document.body.appendChild(script);
}
return nextTick;
}();
var nextTick5 = function () {
// FAILS ON SOME BROWSERS SO USE SETTIMEOUT INSTEAD
function nextTick(fn) {
var req = new XMLHttpRequest;
req.open('GET','data:text/plain,foo', false);
req.onreadystatechange = function() {
req.onreadystatechange = null;
fn();
};
req.send(null);
}
return nextTick;
}();
var nextTick6 = function () {
var key = 'nextTick__' + Math.random();
var queue = [];
window.addEventListener('message', function (e) {
if (e.data !== key) {
return;
}
queue.shift()();
},false);
function nextTick(fn) {
queue.push(fn);
window.postMessage(key, '*');
}
return nextTick;
}();
var nextTick7 = function () {
function nextTick(fn) {
requestAnimationFrame(fn);
}
return nextTick;
}();
var nextTick8 = function () {
var resolved = Promise.resolve();
function nextTick(fn) {
resolved.then(fn);
}
return nextTick;
}();
var nextTick9 = setImmediate;
Ready to run.
Test | Ops/sec | |
---|---|---|
MessageChannel (fallback to setTimeout on Firefox) |
| ready |
setTimeout |
| ready |
Image.onerror |
| ready |
script.onload |
| ready |
window.onmessage |
| ready |
requestAnimationFrame |
| ready |
Promise.prototype.then |
| ready |
setImmediate |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.