Run results for: instanceof vs constructor.name vs field

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0

Browser: Firefox 148

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Benchmark engine: Benchmark.js

field

3585.4M/s

constructor.name

3453.7M/s

instanceof

351.4M/s

View exact numbers

Script Preparation code:

var A = class A {
	_className = 'A'
}

var a = new A()

Tests: