Run results for: instanceof vs check attr

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Pixel 5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.88 Mobile Safari/537.36

Browser: Chrome Mobile 100

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
instanceof	1696152.2 Ops/sec
Check attr	8239434.5 Ops/sec

Script Preparation code:

var obj = {a: "HELLO"}

Tests: