How does opens and reflection impact performance or memory usage?

// Example of using Reflection in Java
import java.lang.reflect.Method;

public class ReflectionExample {
    public void sampleMethod() {
        System.out.println("Sample Method Executed");
    }

    public static void main(String[] args) {
        try {
            Class> clazz = Class.forName("ReflectionExample");
            Object instance = clazz.getDeclaredConstructor().newInstance();
            Method method = clazz.getDeclaredMethod("sampleMethod");
            method.invoke(instance);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}