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

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; SM-G973F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.152 Mobile Safari/537.36

Browser: Chrome Mobile 88

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Object.prototype.hasOwnProperty	990282.6 Ops/sec
obj.hasOwnProperty	1954943.1 Ops/sec
null check	993203.3 Ops/sec
function check	994838.2 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;