Run results for: instanceof vs typeof 2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Linux

Device Platform: Desktop

Date tested: 17 days ago

Test name	Executions per second
instanceof	128272848.0 Ops/sec
typeof	1442049664.0 Ops/sec
typeof no function	722150528.0 Ops/sec
typeof obj or string	715871360.0 Ops/sec
new Ojb	1160713984.0 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 obj or string
typeof obj === 'object' && typeof obj === 'string'
new Ojb
Object(obj) == obj

;