Run results for: Array.sort vs Array.map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/118.0

Browser: Firefox 118

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.sort + Array.findIndex	12.5 Ops/sec
Array.map + Array.find	76.6 Ops/sec

Script Preparation code:

const shuffleArray = array => {
    const arr = [...array];
    for (let i = arr.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        const temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }
    return arr;
}

var testArr = Array.from({
    length: 5000
}, () => Math.floor(Math.random() * 4000));
var scrambled = shuffleArray(testArr);

Tests:

Array.sort + Array.findIndex
scrambled.sort((a,b) => testArr.findIndex(t => t === a) - testArr.findIndex(t => t === b));
Array.map + Array.find
testArr.map((t) => scrambled.find(s => s === t));

Run results for: Array.sort vs Array.map

Sort array according to sort order of other array

Array.sort + Array.findIndex

Array.map + Array.find