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Run results for:
Array Diffs
Filter vs For loop vs Set vs Reduce
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<iframe src="https://measurethat.net/Embed?id=519623" 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/17.2.1 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
For loop
35.1M/s
Reduce
14.2M/s
Filter
5.4M/s
Set
2.3M/s
View exact numbers
Test name
Executions per second
✓
For loop
35,094,612 Ops/sec
Reduce
14,183,769 Ops/sec
Filter
5,361,588 Ops/sec
Set
2,284,014 Ops/sec
Tests:
Filter
const array1 = [1, 2, 3, 4, 5]; const array2 = [3, 4, 5, 6, 7]; const difference = array1.filter((element) => !array2.includes(element));
For loop
const array1 = [1, 2, 3, 4, 5]; const array2 = [3, 4, 5, 6, 7]; const difference = []; for (let i = 0; i < array1.length; i++) { if (array2.indexOf(array1[i]) === -1) { difference.push(array1[i]); } }
Set
const array1 = [1, 2, 3, 4, 5]; const array2 = [3, 4, 5, 6, 7]; const set1 = new Set(array1); const set2 = new Set(array2); const difference = [...set1].filter( (element) => !set2.has(element));
Reduce
const array1 = [1, 2, 3, 4, 5]; const array2 = [3, 4, 5, 6, 7]; const difference = array1.reduce((result, element) => { if (array2.indexOf(element) === -1) { result.push(element); } return result; }, []);