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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
string concat + join	42014640.0 Ops/sec
unshift + join	5546.5 Ops/sec

Script Preparation code:

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

Tests: