Run results for: instanceof vs typeof 3 - 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: one year ago

typeof

1445.6M/s

new Ojb

1102.1M/s

typeof obj or string

717.2M/s

typeof no function

712.6M/s

instanceof

129.4M/s

string or obj

43.2M/s

View exact numbers

Test name	Executions per second
✓ typeof	1,445,575,296 Ops/sec
new Ojb	1,102,101,632 Ops/sec
typeof obj or string	717,184,768 Ops/sec
typeof no function	712,616,832 Ops/sec
instanceof	129,415,968 Ops/sec
string or obj	43,195,492 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
string or obj
['object', 'string'].includes(typeof obj)