Run results for: Array.includes vs. Object key lookup vs. Set.has

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:99.0) Gecko/20100101 Firefox/99.0

Browser: Firefox 99

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
includes	33975192.0 Ops/sec
key lookup	1010907712.0 Ops/sec
Set.has	1021514880.0 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var b = {1: true, 2: true, 3: true, 4: true, 5: true, 6: true, 7: true, 8: true, 9: true, 10: true}
var c = new Set(a);

Tests:

includes
return a.includes(9)
key lookup
return !!b['9']
Set.has
return c.has(9)