Run results for: === undefined vs hasOwnProperty

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:89.0) Gecko/89.0 Firefox/89.0

Browser: Firefox Mobile 89

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
undefined	9822972.0 Ops/sec
hasOwnProperty	47849824.0 Ops/sec

Script Preparation code:

o = {'2020': 2, '2022': 2, '2024': 3, '2026': 4, '2028': 5, '2030': 5};

Tests: