Run results for: custom diff VS sort join

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
getDiffArrays	0.7 Ops/sec
Sort Join	1.5 Ops/sec

Tests:

getDiffArrays
const arr1 = new Array(1000).fill(null).map(n => Math.random().toFixed(2)); const arr2 = new Array(1000).fill(null).map(n => Math.random().toFixed(2)); const getDiffArrays = ( arrA, arrB, ) => { const { diffA, diffB } = arrA.reduce( (acc, a) => { const index = acc.diffB.indexOf(a); if (index === -1) { acc.diffA.push(a); } else { acc.diffB.splice(index, 1); } return acc; }, { diffA: [], diffB: [...arrB] }, ); return { all: diffA.concat(diffB), diffA, diffB }; }; for(let i = 0; i < 1000; i++) { getDiffArrays(arr1, arr2); }
Sort Join
const arr1 = new Array(1000).fill(null).map(n => Math.random().toFixed(2)); const arr2 = new Array(1000).fill(null).map(n => Math.random().toFixed(2)); const getDiffSortJoin = ( arrA, arrB, ) => { const a = arrA.sort((a, b) => a - b).join(); const b = arrB.sort((a, b) => a - b).join(); return a !== b; }; for(let i = 0; i < 1000; i++) { getDiffSortJoin(arr1, arr2); }