Run results for: instanceof vs typeof vs attribute - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SM-A725F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 106

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
instanceof	1827554.2 Ops/sec
typeof	5609618.5 Ops/sec
typeof no function	2779546.2 Ops/sec
typeof and test attribute	2826648.5 Ops/sec
attribte	1855127.5 Ops/sec

Script Preparation code:

var obj = {a:2};

Tests:

instanceof
obj instanceof Object
typeof
typeof obj === 'object'
typeof no function
typeof obj === 'object' && typeof obj !== 'function'
typeof and test attribute
typeof obj === 'object' && obj.a
attribte
obj.a !== undefined

;