Run results for: map vs forEach/push (1000 elements)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

forEach/push

4.0M/s

map

3.2M/s

View exact numbers

Test name	Executions per second
✓ forEach/push	3,982,512 Ops/sec
map	3,162,528 Ops/sec

Script Preparation code:

window.arr = new Array({ length: 1000 }, (_, i) => `Option ${i + 1}`);

Tests:

map
const newArr = window.arr.map(element => ({ label: element, value: element })); newArr.unshift({ label: 'User', value: 'User' });
forEach/push
const newArr = []; newArr.push({ label: 'User', value: 'User' }) window.arr.forEach(element => { newArr.push({ label: element, value: element }) })