Run results for: instanceof vs typeof 3 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser: Chrome 89

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
instanceof	4186917.8 Ops/sec
typeof	12903919.0 Ops/sec
typeof no function	6395506.0 Ops/sec
typeof and test attribute	5960709.0 Ops/sec
test attribute	12738981.0 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
test attribute
obj.a

;