Benchmark: regexp with i option VS regexp with lowercase input

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)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx lowered
regex i

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

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

Browser/OS: Chrome 146 on Linux

View result in a separate tab

Test name	Executions per second
RegEx lowered	27842870.0 Ops/sec
regex i	38630512.0 Ops/sec

Related benchmarks:

RegEx.test vs. String.includes vs. String.match
RegEx.test vs. String.includes vs. String.match in case insensitive scenarios
test test
RegEx.test vs. String.toLowerCase().includes vs. String.match
RegEx.test vs. String.includes vs. String.match vs String.match(regex) for starting string
RegEx.test vs. String.includes vs. String.match Case Insensitive
RegEx.test vs. String.includes vs. String.match (case-insensitive)
RegEx.test vs. String.includes vs. String.match with lowercase
Regex vs string compare

regexp with i option VS regexp with lowercase input (version: 1)

test it

Comparing performance of: RegEx lowered vs regex i

Created: one month ago by: Guest

Jump to the latest result

RegEx lowered

regex i

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A