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Run results for:
Math.random().toString(36).substring(2, 12) vs Date.now()
Which is best for generating a unique key?
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=599736" 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/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
Date.now()
28.3M/s
Math.random().toString(36).substring(2, 12)
5.6M/s
View exact numbers
Test name
Executions per second
✓
Date.now()
28,278,536 Ops/sec
Math.random().toString(36).substring(2, 12)
5,631,745 Ops/sec
Tests:
Math.random().toString(36).substring(2, 12)
Math.random().toString(36).substring(2, 12)
Date.now()
Date.now()