Run results for: string concat + join vs unshift + join

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

string concat + join

3.3M/s

unshift + join

2K/s

View exact numbers

Test name	Executions per second
✓ string concat + join	3,263,035 Ops/sec
unshift + join	2,177 Ops/sec

Script Preparation code:

var el = 'test';
var arr = ['foo', 'bar'];

Tests: