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@paulirish
Last active March 7, 2019 00:55
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array augmenting: push read vs concat (http://jsbench.github.io/#e412522baff1e164b3dd1c679f2f0845) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>array augmenting: push read vs concat</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 () {
var concatContainer = [];
var pushContainer = [];
var dataToFeed = [];
var initialArrayLength = 1e3;
for (var j = 0; j < initialArrayLength; j++){
concatContainer.push('stuff' + j);
pushContainer.push('stuff' + j);
dataToFeed.push('stuff' + j);
}
};
suite.add("concatContainer = concatContainer.concat(dataToFeed);", function () {
concatContainer = concatContainer.concat(dataToFeed);
});
suite.add("pushContainer.push(...dataToFeed);", function () {
pushContainer.push(...dataToFeed);
});
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("array augmenting: push read vs concat");
console.log(new Array(30).join("-"));
suite.run();
});
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