Skip to content

Instantly share code, notes, and snippets.

@nicholasaiello
Last active December 27, 2017 08:34
Show Gist options
  • Save nicholasaiello/d04e0c2aefb8feb28293a868294c129a to your computer and use it in GitHub Desktop.
Save nicholasaiello/d04e0c2aefb8feb28293a868294c129a to your computer and use it in GitHub Desktop.
Math.ab VS Bitwise abs (http://jsbench.github.io/#d04e0c2aefb8feb28293a868294c129a) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Math.ab VS Bitwise abs</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
<h2><code>cmd + alt + j</code> or <code>ctrl + alt + j</code></h2>
</body>
</html>
"use strict";
(function (factory) {
if (typeof Benchmark !== "undefined") {
factory(Benchmark);
} else {
factory(require("benchmark"));
}
})(function (Benchmark) {
var suite = new Benchmark.Suite;
Benchmark.prototype.setup = function () {
const n = -100.32;
};
suite.add("const abs = Math.abs(n);", function () {
const abs = Math.abs(n);
});
suite.add("const getAbsoluteValue = (n) => {", function () {
const getAbsoluteValue = (n) => {
if (n >= 0) {
return n;
}
const mask = n >> 31;
const abs = (mask ^ n) - mask;
return abs - (n - (n >> 0));
};
const abs = getAbsoluteValue(n);
});
suite.on("cycle", function (evt) {
console.log(" - " + evt.target);
});
suite.on("complete", function (evt) {
console.log(new Array(30).join("-"));
var results = evt.currentTarget.sort(function (a, b) {
return b.hz - a.hz;
});
results.forEach(function (item) {
console.log((idx + 1) + ". " + item);
});
});
console.log("Math.ab VS Bitwise abs");
console.log(new Array(30).join("-"));
suite.run();
});
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment