Run results for: set.has vs. Object key lookup for real

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/118.0

Browser: Firefox 118

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
set.has	507369200.0 Ops/sec
key lookup	535082800.0 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}

Tests:

set.has
return a.has(9)
key lookup
return !!b['9']