Run results for: regexp with i option VS regexp with lowercase input

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser: Chrome 146

Operating system: Linux

Device Platform: Desktop

Date tested: 5 months ago

Benchmark engine: Benchmark.js

regex i

38.6M/s

RegEx lowered

27.8M/s

View exact numbers

Test name	Executions per second
✓ regex i	38,630,512 Ops/sec
RegEx lowered	27,842,870 Ops/sec

Script Preparation code:

var string = "Hello world!";
var test1 = (input)=>{
  var lower = input.toLowerCase();
  var pattern = /\b(wtf|shit|etc)\b/;
  return pattern.test(lower);
}
var test2 = (input)=>{
  var pattern = /\b(wtf|shit|etc)\b/i;
  return pattern.test(input);
}

Tests:

RegEx lowered
test1(string)
regex i
test2(string)

Run results for: regexp with i option VS regexp with lowercase input

test it

RegEx lowered

regex i