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Run results for:
startsWith() vs always replace()
This benchmark compares always doing a replace() vs checking if string starts with
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<iframe src="https://measurethat.net/Embed?id=574982" 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
Benchmark engine:
Benchmark.js
Using startsWith
7K/s
Using replace
462/s
View exact numbers
Test name
Executions per second
✓
Using startsWith
6,524 Ops/sec
Using replace
462 Ops/sec
Tests:
Using replace
var n = 0; while(true) { var authHeader = 'asdf123asdf123asdf123asdf123asdf123asdf123'; authHeader.replace('Bearer ', ''); n++; if(n==100000) break; }
Using startsWith
var n = 0; while(true) { var authHeader = 'asdf123asdf123asdf123asdf123asdf123asdf123'; if (authHeader.startsWith('Bearer ')) authHeader.slice('Bearer '.length); n++; if(n==100000) break; }