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| const { performance } = require('perf_hooks'); | |
| var mapLoop = function(arr, callback){ | |
| return arr.map(callback) | |
| } | |
| var forLoop = function(arr, callback){ | |
| for(let i=0; i < arr.length; i++){ | |
| callback(arr[i], i, arr) | |
| } | |
| } | |
| var run = function(name, times, fn, arr, callback){ | |
| var start = performance.now() | |
| for(let i=0; i<times; i++){ | |
| fn(arr, callback) | |
| } | |
| var end = performance.now() | |
| console.log('Running %s %d times cost %d ms', name, times, end - start) | |
| } | |
| var testArr = [0, 1, 2, 3, 4, 5, 6] | |
| var callback = d => d | |
| run('mapLoop', 10000000, mapLoop, testArr, callback) | |
| run('forLoop', 10000000, forLoop, testArr, callback) |
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