Run results for: charCodeAt vs []

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Pixel 2 XL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Mobile Safari/537.36

Browser: Chrome Mobile 91

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
charCodeAt(0)	3572319.8 Ops/sec
charCodeAt(300)	3612198.0 Ops/sec
[0]	3606347.0 Ops/sec
[10]	3589847.8 Ops/sec

Script Preparation code:

var str = "some string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string heresome string here"

Tests:

charCodeAt(0)
str.charCodeAt(0)
charCodeAt(300)
str.charCodeAt(300)
[0]
str[0]
[10]
str[300]

Run results for: charCodeAt vs []

charCodeAt(0)

charCodeAt(300)

[0]

[10]