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nested Array.prototype.slice vs [].slice.call vs cached prototype vs cached [].slice (http://jsbench.github.io/#70b2b0cf82209c4bbf9d342a8684e3bd) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>nested Array.prototype.slice vs [].slice.call vs cached prototype vs cached [].slice</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>
Raw
suite.js
"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 () {
var items = [1, 2, 3, 4, 5];
var slice = Array.prototype.slice;
var _slice = [].slice;
};
suite.add("Array.prototype.slice", function () {
/* Array.prototype.slice */
(function() {
var x;
(function() {
var y = 9;
(function() {
var z = 3;
Array.prototype.slice.call(items);
})()
})()
})()
});
suite.add("[].slice", function () {
/* [].slice */
(function() {
var x;
(function() {
var y = 9;
(function() {
var z = 3;
[].slice.call(items);
})()
})()
})()
});
suite.add("cached Array.prototype.slice", function () {
/* cached Array.prototype.slice */
(function() {
var x;
(function() {
var y = 9;
(function() {
var z = 3;
slice.call(items);
})()
})()
})()
});
suite.add("cached [].slice", function () {
/* cached [].slice */
(function() {
var x;
(function() {
var y = 9;
(function() {
var z = 3;
_slice.call(items);
})()
})()
})()
});
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("nested Array.prototype.slice vs [].slice.call vs cached prototype vs cached [].slice");
console.log(new Array(30).join("-"));
suite.run();
});
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