Run results for: instanceof vs typeof - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
instanceof	11239349.0 Ops/sec
typeof	29889284.0 Ops/sec
typeof no function	16046797.0 Ops/sec
typeof and test attribute	15730279.0 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

;