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November 21, 2018 15:56
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getUniqueList (https://jsbench.github.io/#8e4a73bfaf9ea0ef533ece380e645780) #jsbench #jsperf
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"/> | |
<title>getUniqueList</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> |
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"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 () { | |
let data = [ | |
{ | |
name: 'A', | |
age: 7, | |
}, | |
{ | |
name: 'B', | |
age: 12, | |
}, | |
{ | |
name: 'C', | |
age: 17, | |
}, | |
{ | |
name: 'A', | |
age: 23, | |
}, | |
]; | |
}; | |
suite.add("let getList = (data, key) => {", function () { | |
let getList = (data, key) => { | |
return [...new Set(data.reduce((acc, item) => { | |
if (item.hasOwnProperty(key)) { | |
return acc.concat(item[key]) | |
} | |
return acc; | |
}, []))] | |
} | |
getList(data, 'name'); | |
}); | |
suite.add("let getListMK2 = (data, key) => {", function () { | |
let getListMK2 = (data, key) => { | |
let list = new Set(data.map(item => item[key])); | |
list.delete(null); | |
list.delete(undefined); | |
return [...list] | |
} | |
getListMK2(data, 'name'); | |
}); | |
suite.add("function getUniqueList(", function () { | |
function getUniqueList( | |
list, | |
key, | |
) { | |
return [...new Set(list.map((data) => data[key]))].filter( | |
(datum) => datum != null, | |
); | |
} | |
getUniqueList(data, 'name') | |
}); | |
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("getUniqueList"); | |
console.log(new Array(30).join("-")); | |
suite.run(); | |
}); |
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