Run results for: set.has vs. Object key lookup vs array.includes

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
set.has	1323559936.0 Ops/sec
key lookup	1229043200.0 Ops/sec
array.includes	34786288.0 Ops/sec

Script Preparation code:

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

Tests:

set.has
return a.has(9)
key lookup
return b['9']
array.includes
return c.includes(10);