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get last item / key / value in map #jsbench #jsperf (https://jsbench.github.io/#7992a793df12b1ee16beaef7a9863c68) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>get last item / key / value in map #jsbench #jsperf</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 map = new Map(); | |
| for (let i = 0; i < 100; i++) { | |
| map.set( | |
| "key_"+Math.random(), | |
| "value_"+Math.random() | |
| ); | |
| } | |
| const F1 = {}; | |
| F1.getLastItemInMap = map => Array.from(map)[map.size-1]; | |
| F1.getLastKeyInMap = map => Array.from(map)[map.size-1][0]; | |
| F1.getLastValueInMap = map => Array.from(map)[map.size-1][1]; | |
| const F2 = {}; | |
| F2.lastItemInMap = map => Array.from(map).pop(); | |
| F2.lastKeyInMap = map => Array.from(map.keys()).pop(); | |
| F2.lastValueInMap = map => Array.from(map.values()).pop(); | |
| const F3 = {}; | |
| F3.lastItemInMap = map => [...map].pop(); | |
| F3.lastKeyInMap = map => [...map.keys()].pop(); | |
| F3.lastValueInMap = map => [...map.values()].pop(); | |
| }; | |
| suite.add("F1.getLastItemInMap(map);", function () { | |
| F1.getLastItemInMap(map); | |
| }); | |
| suite.add("F1.getLastKeyInMap(map);", function () { | |
| F1.getLastKeyInMap(map); | |
| }); | |
| suite.add("F1.getLastValueInMap(map);", function () { | |
| F1.getLastValueInMap(map); | |
| }); | |
| suite.add("F2.lastItemInMap(map);", function () { | |
| F2.lastItemInMap(map); | |
| }); | |
| suite.add("F2.lastKeyInMap(map);", function () { | |
| F2.lastKeyInMap(map); | |
| }); | |
| suite.add("F2.lastValueInMap(map);", function () { | |
| F2.lastValueInMap(map); | |
| }); | |
| suite.add("F3.lastItemInMap(map);", function () { | |
| F3.lastItemInMap(map); | |
| }); | |
| suite.add("F3.lastKeyInMap(map);", function () { | |
| F3.lastKeyInMap(map); | |
| }); | |
| suite.add("F3.lastValueInMap(map);", function () { | |
| F3.lastValueInMap(map); | |
| }); | |
| 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("get last item / key / value in map #jsbench #jsperf"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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