Run results for: CharAt vs subscript ( [] ) in Javascript String

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser: Chrome 117

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

[n]

421K/s

CharAt (n)

419K/s

[len-1]

419K/s

[0]

414K/s

CharAt (0)

412K/s

charAt(len-1)

405K/s

View exact numbers

Script Preparation code:

const str = "Hello World";

Tests:

CharAt (0)
const str = "Hello World"; console.log(str.charAt(0))
[0]
const str = "Hello World"; console.log(str[0])
CharAt (n)
let n = 5; const str = "Hello World"; console.log(str.charAt(n))
[n]
let n = 5; const str = "Hello World"; console.log(str[n])
charAt(len-1)
const str = "Hello World"; let len = str.length; console.log(str.charAt(len-1))
[len-1]
const str = "Hello World"; let len = str.length; console.log(str[len-1])