Run results for: charCodeAt vs charAt

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 months ago

Benchmark engine: Benchmark.js

charCodeAt

39.1M/s

use []

20.5M/s

charAt

20.2M/s

View exact numbers

Script Preparation code:

var a = "abcdefghijklmnopqrstuvwxyz"
var b = "x"
var c = b.charCodeAt(0)

Tests:

charAt
for(let i = 0; i < a.length; ++i) { if(a.charAt(i) == b) break; }
charCodeAt
for(let i = 0; i < a.length; ++i) { if(a.charCodeAt(i) == c) break; }
use []
for(let i = 0; i < a.length; ++i) { if(a[i] == b) break; }