Run results for: Copying Set vs Object vs Map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Set	803232.3 Ops/sec
Object	574439.4 Ops/sec
Map	714078.1 Ops/sec

Script Preparation code:

var set = new Set(["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"]);
var obj = {"one": true, "two": true, "three": true, "four": true, "five": true, "six": true, "seven": true, "eight": true, "nine": true, "ten": true};
var map = new Map([["one", true], ["two", true], ["three", true], ["four", true], ["five", true], ["six", true], ["seven", true], ["eight", true], ["nine", true], ["ten", true]]);

Tests:

Set
var set2 = new Set(set) set2.add('foo')
Object
var obj2 = { ...obj, 'foo': true }
Map
var map2 = new Map(map) map2.set('foo', true)