Run results for: detecting if var is instance of class

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Windows

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
instanceof	69844.6 Ops/sec
prop test	71144.2 Ops/sec

Tests:

instanceof
class NewError extends Error { constructor() { super() this.customProp = 'blah' } customProp } const testErr = new NewError() testErr instanceof NewError
prop test
class NewError extends Error { constructor() { super() this.customProp = 'blah' } customProp } const testErr = new NewError() !!testErr && typeof testErr === 'object' && 'customProp' in testErr