Run results for: json stringify vs array tostring vs array join

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Array.join

6.9M/s

toString

6.8M/s

JSON.stringify

3.8M/s

View exact numbers

Test name	Executions per second
✓ Array.join	6,939,026 Ops/sec
toString	6,797,245 Ops/sec
JSON.stringify	3,841,601 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:

toString
makeTestData().toString()
JSON.stringify
JSON.stringify(makeTestData());
Array.join
makeTestData().join(',')