Run results for: hasOwn vs hasOwnProperty vs typeof

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/114.3 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 16

Operating system: iOS 16.5.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
typeof	27752644.0 Ops/sec
hasOwn	10420401.0 Ops/sec
hasOwnProperty	26056988.0 Ops/sec

Script Preparation code:

var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };

Tests:

typeof
typeof obj.d !== "undefined";
hasOwn
Object.hasOwn(obj, 'd')
hasOwnProperty
obj.hasOwnProperty( 'd' );

Run results for: hasOwn vs hasOwnProperty vs typeof

Object lookup performance

typeof

hasOwn

hasOwnProperty