Run results for: array iteration vs map + filter vs for..of vs for loop

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

Test name	Executions per second
forEach	15592.1 Ops/sec
map	15163.5 Ops/sec
for..of	15461.5 Ops/sec
for loop	15637.4 Ops/sec

Script Preparation code:

const obj = (id, data = false) => ({
    data: data ? {} : undefined,
    id
})

const array = [...Array.from({
    length: 10
})].map((_, i) => obj(i, i % 2 === 0))

Tests:

forEach
array.forEach((value, index) => { if (value.data) { console.log(value) } })
map
array.filter(({ data }) => !!data).map((value, index) => { console.log(value) })
for..of
for (const value of array) { if (value.data) { console.log(value) } }
for loop
for (let i = 0; i < array.length; i++) { if (array[i].data) { console.log(array[i]) } }

Run results for: array iteration vs map + filter vs for..of vs for loop

forEach

map

for..of

for loop