Run results for: set.has vs. array.includes - including extra code for more fair comparison as typically you will have an array and not a set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
includes	8410854.0 Ops/sec
lookup	438596.0 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
// var b = new Set(a)

AخA
 
var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];// var b = new Set(a)

Tests: