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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Windows 8.1

Device Platform: Desktop

Date tested: 5 years ago

Script Preparation code:

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

Tests: