Run results for: simple array and map vs forEach vs for by cuteLuna v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

map

39.5M/s

for

33.0M/s

foreach

31.7M/s

View exact numbers

Script Preparation code:

const arr = [{ name: 'luna', id: 3 },{ name: 'abc', id: 4 }, { name: 'eee', id: 3 }]

Tests:

map
const arr = [{ name: 'luna', id: 3 },{ name: 'abc', id: 4 }, { name: 'eee', id: 3 }] const newArr = arr.map(e=> ({ label: e.name, id: e.id}))
foreach
const arr = [{ name: 'luna', id: 3 },{ name: 'abc', id: 4 }, { name: 'eee', id: 3 }] const newArr = []; arr.forEach(item => { newArr.push({ label: item.name, id: item.id }) })
for
const arr = [{ name: 'luna', id: 3 }, { name: 'abc', id: 4 }, { name: 'eee', id: 3 }]; const arrLength = arr.length; const newArr = []; for (let i = 0; i < arrLength; i++) { newArr.push({ label: arr[i].name, id: arr[i].id }); }