Run results for: Which is more efficient .replace() or .split().map().join()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0

Browser: Firefox 54

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
splitmapjoin	153742.5 Ops/sec
replace	26877.7 Ops/sec
for	426364.0 Ops/sec

Script Preparation code:

var testString = '052768194390675213483698521470';
function fakeBin(strNums){ 
  return strNums.split("")
                .map(num => num = num < 5 ? 0 : 1)
                .join("")
}
function fakeBin2(x) {
  return x.replace(/\d/g, n => "0000011111"[n])
}
function fakeBin3(word) {
  let result = '';
  for (var i = 0; i < word.length; i++) {
    result += Number(word[i]) < 5 ? 0 : 1;
  }
  return result;
}

Tests:

splitmapjoin
fakeBin(testString)
replace
fakeBin2(testString)
for
fakeBin3(testString)

Run results for: Which is more efficient .replace() or .split().map().join()

splitmapjoin

replace

for