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May 10, 2020 01:10
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Map vs Object #jsbench #jsperf
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"/> | |
<title>Map vs Object</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 () { | |
const boldifyObject = (() => { | |
const mapChars = (lookup, startAscii, endAscii, codepoint) => { | |
var ascii = startAscii.codePointAt(0); | |
for (var range = endAscii.codePointAt(0) - ascii, i = 0; i <= range; ++i) { | |
lookup[String.fromCodePoint(ascii + i)] = String.fromCodePoint(codepoint + i); | |
} | |
}; | |
// https://unicode-search.net/unicode-namesearch.pl?term=BOLD | |
const toBold = {}; | |
mapChars(toBold, "0", "9", 0x1d7ce); | |
mapChars(toBold, "A", "Z", 0x1d400); | |
mapChars(toBold, "a", "z", 0x1d41a); | |
const fromBold = {}; | |
/* tslint:disable-next-line:forin */ | |
for (let key in toBold) { fromBold[toBold[key]] = key; } | |
const boldify = (str) => { | |
var result = ""; | |
for (var len = str.length, i = 0; i < len; ++i) { result += toBold[str[i]] || str[i]; } | |
return result; | |
}; | |
boldify.undo = (str) => { | |
var arr = Array.from(str); | |
for (var len = arr.length, i = 0; i < len; ++i) { arr[i] = fromBold[arr[i]] || arr[i]; } | |
return arr.join(""); | |
}; | |
return boldify; | |
})(); | |
const boldifyMap = (() => { | |
const initChars = (lookup, startAscii, endAscii, codepoint) => { | |
var ascii = startAscii.codePointAt(0); | |
for (var range = endAscii.codePointAt(0) - ascii, i = 0; i <= range; ++i) { | |
lookup.set(String.fromCodePoint(ascii + i), String.fromCodePoint(codepoint + i)); | |
} | |
}; | |
const toBold = new Map(); | |
const fromBold = new Map(); | |
// https://unicode-search.net/unicode-namesearch.pl?term=BOLD | |
initChars(toBold, "0", "9", 0x1d7ce); | |
initChars(toBold, "A", "Z", 0x1d400); | |
initChars(toBold, "a", "z", 0x1d41a); | |
/* tslint:disable-next-line:forin */ | |
for (let key of toBold.keys()) { fromBold.set(toBold.get(key), key); } | |
const boldify = (str) => { | |
var result = ""; | |
for (var len = str.length, i = 0; i < len; ++i) { result += toBold.has(str[i]) ? toBold.get(str[i]) : str[i]; } | |
return result; | |
}; | |
boldify.undo = (str) => { | |
var arr = Array.from(str); | |
for (var len = arr.length, i = 0; i < len; ++i) { | |
if (fromBold.has(arr[i])) { arr[i] = fromBold.get(arr[i]); } | |
} | |
return arr.join(""); | |
}; | |
return boldify; | |
})(); | |
}; | |
suite.add("Object", function () { | |
// Object | |
let src = "~!@#$%^&*()_+`1234567890-=qwertyuiop[]\\asdfghjkl;'zxcvbnm,./QWERTYUIOP{}|ASDFGHJKL:ZXCVBNM<>?"; | |
let bolded = boldifyObject(src); | |
let restored = boldifyObject.undo(bolded); | |
if (src !== restored) { throw new Error("Bad Implementation: " + restored); } | |
}); | |
suite.add("Map", function () { | |
// Map | |
let src = "~!@#$%^&*()_+`1234567890-=qwertyuiop[]\\asdfghjkl;'zxcvbnm,./QWERTYUIOP{}|ASDFGHJKL:ZXCVBNM<>?"; | |
let bolded = boldifyMap(src); | |
let restored = boldifyMap.undo(bolded); | |
if (src !== restored) { throw new Error("Bad Implementation: " + restored); } | |
}); | |
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("Map vs Object"); | |
console.log(new Array(30).join("-")); | |
suite.run(); | |
}); |
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