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Run results for:
JavaScript V8 Array.push vs spread operator
Which is faster
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<iframe src="https://measurethat.net/Embed?id=627544" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36
Browser:
Chrome 141
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one month ago
Test name
Executions per second
Array.push in for loop
297677.2 Ops/sec
Spread operator
18429.7 Ops/sec
Tests:
Array.push in for loop
const arr1 = Array(1000).fill(0); const arr2 = Array(0); for (const el of arr1) { arr2.push(el) }
Spread operator
const arr1 = Array(10000).fill(0); let arr2 = Array(0); for (const el of arr1) { arr2 = [arr2, el] }