Run results for: Object.prototype.hasOwnProperty vs obj.hasOwnProperty vs exists check vs 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object.prototype.hasOwnProperty	3085886.8 Ops/sec
obj.hasOwnProperty	6538540.5 Ops/sec
null check	3349970.5 Ops/sec
null check function	3325065.8 Ops/sec

Script Preparation code:

window.obj = { a: 2 }

AخA
 
window.obj = { a: 2 }

Tests:

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