Run results for: Object.prototype.hasOwnProperty vs obj.hasOwnProperty vs exists check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Browser: Chrome 98

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.prototype.hasOwnProperty	3080517.0 Ops/sec
obj.hasOwnProperty	6703662.5 Ops/sec
null check	3303243.5 Ops/sec
function check	3488964.5 Ops/sec

Script Preparation code:

window.obj = { a: 2 }

Tests:

Object.prototype.hasOwnProperty
Object.prototype.hasOwnProperty.call(obj, 'a');
obj.hasOwnProperty
obj.hasOwnProperty('a');
null check
obj.hasOwnProperty ? obj.hasOwnProperty('a') : true;
function check
typeof obj.hasOwnProperty === 'function' ? obj.hasOwnProperty('a') : true;