Run results for: json stringify vs array join with string template

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/114.0

Browser: Firefox 114

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
join	16920060.0 Ops/sec
JSON.stringify	9187871.0 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); }

var data = makeTestData()

Tests:

join
`[${data.join()}]`
JSON.stringify
JSON.stringify(data);

Run results for: json stringify vs array join with string template

join

JSON.stringify