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Run results for:
new Array from vs slice vs push vs index vs spread
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<iframe src="https://measurethat.net/Embed?id=538061" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Array.push
3.8M/s
Array[index]
3.2M/s
Array.slice
2.5M/s
Array spread
2.1M/s
Array.from
2.0M/s
View exact numbers
Test name
Executions per second
✓
Array.push
3,838,806 Ops/sec
Array[index]
3,247,657 Ops/sec
Array.slice
2,454,732 Ops/sec
Array spread
2,111,397 Ops/sec
Array.from
2,040,656 Ops/sec
Tests:
Array.from
const elements = document.all; const arr = Array.from(elements);
Array.slice
const elements = document.all; const arr = Array.prototype.slice.call(elements, 0);
Array.push
const elements = document.all; const amount = elements.length; const arr = []; for (let i = 0; i < amount; i += 1) arr.push(elements[i]);
Array[index]
const elements = document.all; const amount = elements.length; const arr = Array(amount); for (let i = 0; i < amount; i += 1) arr[i] = elements[i];
Array spread
const elements = document.all; const arr = [...elements];