Run results for: json stringify vs array join

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.2.2

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
join	525136.9 Ops/sec
JSON.stringify	455304.7 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:

join
makeTestData().join('-')
JSON.stringify
JSON.stringify(makeTestData());

Run results for: json stringify vs array join

join

JSON.stringify