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June 2, 2018 03:05
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uuid one-liners (https://jsbench.github.io/#b568960328209820790a494a72003bc2) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>uuid one-liners</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 () { | |
| var uuid1 = (a=0,b='')=>{for(;a++<36;b+= ~a%5|a*3&4 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-');return b}; | |
| var uuid2 = (a=0,b='')=>{for(;a++<36;b+= 4<<~a*6.5 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-');return b}; | |
| var uuid3 = (a=0,b='')=>{for(;a++<36;b+= a*51&52 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-');return b}; | |
| var uuid4 = (a=0,b='')=>{while(a++<36)b+= a*51&52 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-';return b}; | |
| var uuid5 = (a=0,b='')=>{while(++a<37)b+= a*51&52 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-';return b}; | |
| var uuid10 = ()=> [...Array(36)].reduce((a,b,c)=>a+= 4<<~c*6.5 ?(c^15?8^Math.random()*(c^20?16:4):4).toString(16):'-',''); | |
| var uuid11 = ()=> [...Array(36)].reduce((a,b,c)=>a+= ++c*51&52 ?(c^15?8^Math.random()*(c^20?16:4):4).toString(16):'-',''); | |
| var uuid12 = ()=> [...Array(36).keys()].map(a=> 4<<~a*6.5 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-').join(''); | |
| var uuid13 = ()=> [...Array(36).keys()].map(a=> ++a*51&52 ?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-').join(''); | |
| var uuid20 = a=> a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, uuid20 ); | |
| }; | |
| suite.add("uuid3();", function () { | |
| uuid3(); | |
| }); | |
| suite.add("uuid4();", function () { | |
| uuid4(); | |
| }); | |
| suite.add("uuid5();", function () { | |
| uuid5(); | |
| }); | |
| 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("uuid one-liners"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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