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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0

Browser: Firefox 99

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.prototype.hasOwnProperty	961442880.0 Ops/sec
obj.hasOwnProperty	903381120.0 Ops/sec
null check	529671776.0 Ops/sec
null check function	804994944.0 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');
null check function
typeof obj.hasOwnProperty === 'function' && obj.hasOwnProperty('a');