Run results for: concat/includes vs spread

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
concat/includes	6902837.0 Ops/sec
spread	18448670.0 Ops/sec

Tests:

concat/includes
let a1 = [0,1,2,3,4,5,6,7,8,9]; const a2 = ['a', 'b', 'c', 'd', 'e', 'f']; if (!a1.includes(a2)) a1 = a1.concat(a2);
spread
let b1 = [0,1,2,3,4,5,6,7,8,9]; const b2 = ['a', 'b', 'c', 'd', 'e', 'f']; b1 = [...b1, ...b2]