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Run results for:
js array copy speed comparison
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=580746" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser:
Chrome 134
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
slice
102.6M/s
map
88.0M/s
array.from
64.2M/s
for loop
54.8M/s
foreach
54.2M/s
View exact numbers
Test name
Executions per second
✓
slice
102,604,200 Ops/sec
map
87,967,328 Ops/sec
array.from
64,181,468 Ops/sec
for loop
54,799,776 Ops/sec
foreach
54,210,156 Ops/sec
Tests:
map
const arr = [1,2,3,4,5] const newArr = arr.map(e=>e)
array.from
const arr = [1,2,3,4,5] const newArr = Array.from(arr)
for loop
const arr = [1,2,3,4,5] let newArr = []; for(let i = 0; i < arr.length; i++) { newArr[i] = arr[i]; }
foreach
const arr = [1,2,3,4,5] let newArr = [] arr.forEach(e => { newArr.push(e) })
slice
const arr = [1,2,3,4,5] const newArr = arr.slice()