Run results for: regexReplace vs arrayReplace

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser: Chrome 60

Operating system: Mac OS X 10.12.6

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
regexReplace	863556.1 Ops/sec
arrayReplace	1209819.5 Ops/sec

Script Preparation code:

var demoStr = 'This is a  demo of a  long string with  multiple spaces occasionally  added throughout  it.';

function regexReplace(str) {
  return str.replace(/\s+/g, ' ');
};

function arrayReplace(str) {
  let resultArr = [];
  const strArr = str.split(' ');
  for (let i = 0; i < strArr.length; i++) {
    if (strArr[i] != '') {
      resultArr.push(strArr[i]);
    }
  }
  return resultArr.join(' ');
};

Tests:

regexReplace
regexReplace(demoStr);
arrayReplace
arrayReplace(demoStr);