Run results for: instanceof vs constructor comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser: Chrome 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Instanceof	6521052.5 Ops/sec
Constructor comparison	6906045.5 Ops/sec

HTML Preparation code:

<script>
class TestClass {
    a = 0;
	b = 0;
    constructor() {
        this.a = 2;
    }
    get GetA() {
        return this.a;
    }
    GetB() {
        return this.b;
    }
}
</script>

Script Preparation code:

var obj = new TestClass();

Tests:

Instanceof
obj instanceof TestClass;
Constructor comparison
obj.constructor === TestClass;

Run results for: instanceof vs constructor comparison

Instanceof

Constructor comparison