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Run results for:
Javascript unique string array
Create a unique array of strings from a possible non-unique array.
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<iframe src="https://measurethat.net/Embed?id=591453" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0
Browser:
Chrome 134
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
Using a Set
2.8M/s
Using an object
1.7M/s
View exact numbers
Test name
Executions per second
✓
Using a Set
2,788,141 Ops/sec
Using an object
1,694,864 Ops/sec
Tests:
Using an object
const nonUnique = ['one', 'two', 'three', 'three', 'four', 'four', 'five', 'six', 'seven', 'eight', 'nine']; const unique = Object.keys(nonUnique.reduce((acc, item) => { if (!acc[item]) { acc[item] = true }; return acc; }, {}));
Using a Set
const nonUnique = ['one', 'two', 'three', 'three', 'four', 'four', 'five', 'six', 'seven', 'eight', 'nine']; const unique = Array.from(new Set(nonUnique));