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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 11.1.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object.prototype.hasOwnProperty	5393112.0 Ops/sec
obj.hasOwnProperty	12172433.0 Ops/sec
null check	5444688.0 Ops/sec
function check	3231009.0 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;