Run results for: Object.hasOwnProperty vs Object in vs Object[]

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var object = {};
var test = 'something10000';

for (var i = 0; i < 10000; i++) {
  object['something' + i] = true;
}

Tests: