Run results for: Testing replaceAll vs splitting a string to perform some operations

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
using split	287626.8 Ops/sec
using regex	229880.3 Ops/sec

Script Preparation code:

function reverseCase(inputString){
  
  // gonna return an empty string if inputString is not a string
  if(typeof inputString !== 'string'){
    return '';
  }
  // we could either do this iterating through the array
  const wordsArray = inputString.split(' ').map(word=>{
    
    return word.slice(0,1).toLowerCase() + word.slice(1).toUpperCase();
  })

return wordsArray.join(' ');
  }

function reverseCaseRegex(inputString){  
  // gonna return an empty string if inputString is not a string
  if(typeof inputString !== 'string'){
    return '';
  }
  // or we could replace it with some regexp operations I think?
  
  const lol = inputString.replaceAll(/\w+/g, (match, p1, p2, p3, offset, string, namedGroups)=>{
      return match.slice(0,1).toLowerCase() + match.slice(1).toUpperCase();;
  })


    return lol;
}

Tests:

using split
const string = 'esta es una frase para probar la conversion de palabras a minuscula la primera y mayuscula el resto'; console.log(reverseCase(string))
using regex
const string = 'esta es una frase para probar la conversion de palabras a minuscula la primera y mayuscula el resto'; console.log(reverseCaseRegex(string))

Run results for: Testing replaceAll vs splitting a string to perform some operations

using split

using regex