Run results for: instanceof vs constructor name vs toString

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser: Chrome 118

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
isInstanceof	3387139.2 Ops/sec
isConstructorName	6612958.0 Ops/sec
isToString	3606813.8 Ops/sec

Script Preparation code:

var toString = Object.prototype.toString
var isInstanceof = v => v && v instanceof Object
var isConstructorName = v => v?.constructor?.name === 'Object'
var isToString = v => toString.call(v) === '[object Object]'

Tests:

isInstanceof
isInstanceof({}) isInstanceof([]) isInstanceof(123) isInstanceof()
isConstructorName
isConstructorName({}) isConstructorName([]) isConstructorName(123) isConstructorName()
isToString
isToString({}) isToString([]) isToString(123) isToString()