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June 13, 2021 21:15
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Cumulative Sum (https://jsbench.github.io/#39d06ea2803f03135ede5a6f560aa8aa) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>Cumulative Sum</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 myArray = [...Array(10000).keys()] | |
| }; | |
| suite.add("Map", function () { | |
| // Map | |
| function prefixSum(nums) { | |
| let psum = 0; | |
| return nums.map(x => psum += x); | |
| }; | |
| prefixSum(myArray); | |
| }); | |
| suite.add("Reduce", function () { | |
| // Reduce | |
| var runningSum = function(nums) { | |
| nums.reduce((acc, _, i) => (nums[i] += acc)); | |
| return nums; | |
| }; | |
| runningSum(myArray); | |
| }); | |
| suite.add("Map + reduce", function () { | |
| // Map + reduce | |
| myArray.map((elem, index) => myArray.slice(0,index + 1).reduce((a, b) => a + b)); | |
| }); | |
| suite.add("Map using ||", function () { | |
| // Map using || | |
| let sum = 0; | |
| myArray.map(elem => sum = (sum || 0) + elem) | |
| }); | |
| suite.add("D3.js cumsum", function () { | |
| // D3.js cumsum | |
| function cumsum(values, valueof) { | |
| var sum = 0, index = 0; | |
| return Float64Array.from(values, valueof === undefined | |
| ? v => (sum += +v || 0) | |
| : v => (sum += +valueof(v, index++, values) || 0)); | |
| } | |
| cumsum(myArray); | |
| }); | |
| 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("Cumulative Sum"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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