Run results for: json stringify vs array join

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.42(0x18002a23) NetType/WIFI Language/en

Browser: Mobile Safari 17

Operating system: iOS 17.0

Device Platform: Mobile

Date tested: 7 months ago

Test name	Executions per second
join	1149979.0 Ops/sec
JSON.stringify	1066779.0 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