Run results for: String concat vs array join

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
String concat	1332759000.0 Ops/sec
Array join	1967015.0 Ops/sec

Tests:

String concat
var target = '' target += '1,' target += '2,' target += '3,' target += '4,' target += '5,' target += '6,' target += '7,' target += '8,' target += '9,' target += '10,' target += '11,' target += '12,' target += '13,' target += '14,' target += '15,' target += '16,' target += '17,' target += '18,' target += '19,' target += '20,'
Array join
var target = [] target.push('1') target.push('2') target.push('3') target.push('4') target.push('5') target.push('6') target.push('7') target.push('8') target.push('9') target.push('10') target.push('11') target.push('12') target.push('13') target.push('14') target.push('15') target.push('16') target.push('17') target.push('18') target.push('19') target.push('20') target.join(',')