Run results for: json stringify vs array join

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 OPR/106.0.0.0

Browser: Opera 106

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

join

1.8M/s

JSON.stringify

1.4M/s

View exact numbers

Test name	Executions per second
✓ join	1,819,982 Ops/sec
JSON.stringify	1,386,133 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());