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Run results for:
js array copy speed comparison - spread
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=592151" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0
Browser:
Firefox 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
map
10653647.0 Ops/sec
array.from
4118789.2 Ops/sec
for loop
15137293.0 Ops/sec
foreach
13655042.0 Ops/sec
slice
13536197.0 Ops/sec
spread
7216431.0 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()
spread
const arr = [1,2,3,4,5] const newArr = [...arr]