Run results for: null vs. hasOwnProperty - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
exist null	462952544.0 Ops/sec
exist hasOwnProperty	481050464.0 Ops/sec
nonexist null	474819392.0 Ops/sec
nonexist hasOwnProperty	478193760.0 Ops/sec

Script Preparation code:

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

Tests:

exist null
obj.d != null;
exist hasOwnProperty
obj.hasOwnProperty( 'd' );
nonexist null
obj.f != null;
nonexist hasOwnProperty
obj.hasOwnProperty( 'f' );