Run results for: JavaScript a.includes(i) + a.push(i) vs new Set(a) + concat() + ...spread

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
!a.includes(x) => a.push(x)	1721530.4 Ops/sec
new Set(a) + spread	1358729.9 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
var b = [2, 4, 6, 11, 12, 13, 14, 15]

Tests: