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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

splitmapjoin

1.9M/s

replace

1.1M/s

for

500K/s

View exact numbers

Test name	Executions per second
✓ splitmapjoin	1,866,325 Ops/sec
replace	1,076,384 Ops/sec
for	499,873 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)