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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
set.has	27799604.0 Ops/sec
key lookup	28932290.0 Ops/sec
array.includes	21867462.0 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);