Run results for: json stringify vs array join

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

join

4.9M/s

JSON.stringify

2.4M/s

View exact numbers

Test name	Executions per second
✓ join	4,944,288 Ops/sec
JSON.stringify	2,442,722 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());