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Run results for:
Alphanumeric String
Check if a string only contains alpha-numeric characters.
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=531684" 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/126.0.0.0 Safari/537.36
Browser:
Chrome 126
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
charCodeAt
6.1M/s
Regex
5.7M/s
View exact numbers
Test name
Executions per second
✓
charCodeAt
6,072,420 Ops/sec
Regex
5,726,811 Ops/sec
HTML Preparation code:
var string = "isAlphaNumeric091";
Script Preparation code:
var string = "isAlphaNumeric091";
Tests:
Regex
/^[a-z0-9]+$/i.test(string)
charCodeAt
function isAlphaNumeric(str) { for (let i = 0; i < str.length; i++) { let code = str.charCodeAt(i) if (!(code > 47 && code < 58) && // numeric (0-9) !(code > 64 && code < 91) && // upper alpha (A-Z) !(code > 96 && code < 123)) { // lower alpha (a-z) return false } } return true } isAlphaNumeric(string)