Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
String toLowerCase vs. Regex test
Different methods of checking whether a string contains upper-case letters
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=490838" 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/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
toLowerCase
199.7M/s
RegExp
7.8M/s
View exact numbers
Test name
Executions per second
✓
toLowerCase
199,706,144 Ops/sec
RegExp
7,780,634 Ops/sec
Tests:
toLowerCase
const strings = [ 'abcd', 'ABCD', 'Abcd', 'defg', 'defG', '1234', 'blah', 'nine', 'TEN', ]; strings.forEach((el) => { el.toLowerCase() === el; });
RegExp
const strings = [ 'abcd', 'ABCD', 'Abcd', 'defg', 'defG', '1234', 'blah', 'nine', 'TEN', ]; strings.forEach((el) => { /[A-Z]/.test(el); });