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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=570183" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0
Browser:
Firefox 132
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Array.slice
2.7M/s
Array[index]
2.5M/s
Array.push
2.3M/s
Array spread
1.1M/s
Array.from
975K/s
View exact numbers
Test name
Executions per second
✓
Array.slice
2,660,799 Ops/sec
Array[index]
2,468,807 Ops/sec
Array.push
2,310,158 Ops/sec
Array spread
1,090,549 Ops/sec
Array.from
974,805 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];