Run results for: json stringify vs array map + join

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; ASUS_X00RD) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Mobile Safari/537.36

Browser: Chrome Mobile 70

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
map + join	50080.1 Ops/sec
JSON.stringify	47216.2 Ops/sec

Script Preparation code:

function moreData(arr, left) {
  if(left === 0) return arr;
  else {
    arr.push(Math.floor(Math.random() * 256));
  	return moreData(arr, left - 1);
  }
}
function makeTestData() { return moreData([], 4); }

Tests:

map + join
makeTestData().map(i => `${i}`).join('-')
JSON.stringify
JSON.stringify(makeTestData());

Run results for: json stringify vs array map + join

map + join

JSON.stringify