Run results for: charCodeAt vs []

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.107 Safari/537.36

Browser: Chrome 87

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
charCodeAt(0)	17325630.0 Ops/sec
charCodeAt(300)	17559290.0 Ops/sec
[0]	17466550.0 Ops/sec
[10]	17361630.0 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]