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@milahu
Last active Oct 5, 2020
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performance of different loop types #jsbench #jsperf (http://jsbench.github.io/#6f65c587af9277325bcda0e69ba44d5f) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>performance of different loop types #jsbench #jsperf</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 token_list =
document.body.innerHTML.split(/([^\d\w\s]|\s+)/g)
.filter(Boolean);
console.log('token_list.length = '+token_list.length);
};
suite.add("for loop", function () {
// for loop
let c = 0;
for (let i = 0; i < token_list.length; i++) {
c += token_list[i].length;
}
});
suite.add("while loop", function () {
// while loop
let c = 0;
let i = 0;
while (token_list[i]) {
c += token_list[i++].length;
}
});
suite.add("forEach loop", function () {
// forEach loop
let c = 0;
token_list.forEach(t => { c += t.length; })
});
suite.add("map loop", function () {
// map loop
let c = 0;
token_list.map(t => { c += t.length; })
});
suite.add("for of loop", function () {
// for of loop
let c = 0;
for (const t of token_list) {
c += t.length;
}
});
suite.add("unrolled for loop", function () {
// unrolled for loop
let c = 0;
try {
for (let i = 0; i < token_list.length; ) {
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
c += token_list[i++].length;
}
} catch (_) {}
});
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("performance of different loop types #jsbench #jsperf");
console.log(new Array(30).join("-"));
suite.run();
});
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