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:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

toString

4.7M/s

JSON.stringify

2.3M/s

Array.join

1.3M/s

View exact numbers

Test name	Executions per second
✓ toString	4,675,918 Ops/sec
JSON.stringify	2,339,163 Ops/sec
Array.join	1,275,290 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(',')