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
<canvas id='editor' style='border:solid'></canvas>
<canvas id='blank' style='display:none'></canvas>
canvas = document.getElementById('editor');
blank = document.getElementById('blank');
ctx = canvas.getContext("2d");
w = canvas.offsetWidth;
h = canvas.offsetHeight;
f1 = function() {
var data = ctx.getImageData(0, 0, w, h).data;
for(var i = 0, l = data.length; i < l; i += 4) {
if(data[i + 3] !== 0) {
return false;
}
}
return true;
};
f2 = function() {
return canvas.toDataURL() === blank.toDataURL();
};
Ready to run.
Test | Ops/sec | |
---|---|---|
Pixels |
| ready |
Data URL |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.