Run results for: concat() vs spread operator

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36

Browser: Chrome 84

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
concat	978132.8 Ops/sec
spread operator	227150.6 Ops/sec

Script Preparation code:

foo = Array.from(Array(1000).keys())
bar = Array.from(Array(1000).keys())

Tests: