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Run results for:
regex vs split+pop vs lastIndexOf+substring
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<iframe src="https://measurethat.net/Embed?id=609982" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser:
Chrome 137
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
lastIndexOf+substring
28.8M/s
split+pop
19.5M/s
RegEx
390K/s
View exact numbers
Test name
Executions per second
✓
lastIndexOf+substring
28,821,536 Ops/sec
split+pop
19,511,430 Ops/sec
RegEx
390,029 Ops/sec
Script Preparation code:
var str = 'arn:aws:evidently:us-east-1:111111:project/project/feature/newExperience';
Tests:
RegEx
str.match(/[^/]+$/)[0];
split+pop
str.split('/').pop();
lastIndexOf+substring
var n = str.lastIndexOf('/');str.substring(n + 1);