for-cache-vs-no-cache

gistfile1.txt

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;

var testArray = [];

for (var s = 0; s < 1000; s++) {
    testArray.push(s * 2);
}

suite
    .add('cacheTest', () => cacheTest(testArray))
    .add('noCacheTest', () => noCacheTest(testArray))
    .on('cycle', event => console.log(String(event.target)))
    .on('complete', function() {console.log('Fastest is ' + this.filter('fastest').map('name'))})
    .run({ 'async': true });

function cacheTest(array) {
    var length = array.length,
        result = Array(length),
        i = 0;

    for(; i < length; i++) {
        result[i] = array[i] * 2;
    }

    return result;
}

function noCacheTest(array) {
    var result = Array(array.length),
        i = 0;

    for(; i < array.length; i++) {
        result[i] = array[i] * 2;
    }

    return result;
}