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Run results for:
Array.from() versus checking to see if item is already an array
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<iframe src="https://measurethat.net/Embed?id=579769" 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/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Check to see if there is an array
65K/s
No check to see if there is an array
65K/s
View exact numbers
Test name
Executions per second
✓
Check to see if there is an array
64,654 Ops/sec
No check to see if there is an array
64,564 Ops/sec
HTML Preparation code:
<!--your preparation HTML code goes here-->
Tests:
No check to see if there is an array
const [Builder, add] = (Math.random() > 0.5) ? [Array, 'push'] : [Set, 'add']; const collection = new Builder(); for (let i = 0; i < 1000; i++) { collection[add](i); } const result = Array.from(collection);
Check to see if there is an array
const [Builder, add] = (Math.random() > 0.5) ? [Array, 'push'] : [Set, 'add']; const collection = new Builder(); for (let i = 0; i < 1000; i++) { collection[add](i); } const result = Array.isArray(collection) ? collection : Array.from(collection);