Run results for: String compare case insensitive: Regex.test() Vs toLowerCase() Vs localeCompare()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser: Chrome 143

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

String

137.9M/s

Regex

45.2M/s

View exact numbers

Test name	Executions per second
✓ String	137,927,040 Ops/sec
Regex	45,174,596 Ops/sec

Script Preparation code:

var value = "hello"
var variable = "heLLo";
var regExp = new RegExp(value,'i');

Tests:

Regex.test()
regExp.test(variable);
toLowerCase()
value===variable.toLowerCase()
localeCompare()
value.localeCompare( variable, undefined, { sensitivity: "base" })