Occurrence using RegEx vs for Loop

Benchmark created on

Setup

const EMPTY_ARRAY = Object.freeze({});
const VALUE_PLACEHOLDER_IN_FORMAT = '#';
const REGEX_TO_MATCH_VALUE_PLACEHOLDER = new RegExp(VALUE_PLACEHOLDER_IN_FORMAT, 'g')

const getDigitPlaceholderMatches = (phoneNumberFormat = '') => {
  const digitPlaceholderMatches = phoneNumberFormat.match(REGEX_TO_MATCH_VALUE_PLACEHOLDER);
  return digitPlaceholderMatches;
};

const getCountOfPhoneNumberDigits = phoneNumberFormat => {
  const digitPlaceholderMatches = getDigitPlaceholderMatches(phoneNumberFormat) || EMPTY_ARRAY;

  const countOfPhoneNumberDigits = digitPlaceholderMatches.length;
  return countOfPhoneNumberDigits;
};


var getCountOfPhoneNumberDigitsUsingForLoop = function getCountOfPhoneNumberDigits(phoneNumberFormat) {
  let count = 0;
  
  for(let i = 0; i < phoneNumberFormat; i++) {
    const curr = phoneNumberFormat[i];
    
    if(curr === VALUE_PLACEHOLDER_IN_FORMAT)
      count++;
  }
  
  return count;
};

const phoneNumberFormat1 = "(###) ###-####";

Test runner

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Testing in
TestOps/sec
Using For Loop
getCountOfPhoneNumberDigitsUsingForLoop(phoneNumberFormat1);
ready
Using RegExp
getCountOfPhoneNumberDigits(phoneNumberFormat1);
ready

Revisions

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