Run results for: Set vs object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Set	488370.4 Ops/sec
Object	482588.3 Ops/sec

Script Preparation code:

var set = new Set();
var obj = new Object();

function makeid()
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < 5; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
}

Tests:

Set
set.add(makeid()); set.has(makeid())
Object
obj[makeid()]=i; if (obj.hasOwnProperty(makeid())) ;