java - How to create a dynamic proxy using ByteBuddy

Question

In Java it is possible to create dynamic proxies using an implementation of InvocationHandler. Despite JVM optimizations, using reflection will always have some overhead invoking a method.

To try to solve this problem, I tried to use ByteBuddy to create the proxy classes at runtime, but the documentation didn't seem clear enough on this aspect.

How do I create a MethodCallProxy in order to forward a method invocation to some class instance?

Edit:

To better clarify my problem, I am providing an example of what I want to achieve:

I am building an RPC system. On each side of a method invocation, I have an interface defining the contract (when both caller/callee are running under the JVM).

@Contract
interface ISomeService {
    fun someMethod(arg0: String, arg1: SomePojo): PojoResult
}

At the call site, I inject a proxy that intercepts all method calls and forwards them to the callee.

ByteBuddy()
    .subclass(Any::class.java)
    .implement(serviceClass)

    // Service contract method delegation
    .method(isDeclaredBy(serviceClass)).intercept(
      MethodDelegation
          .to(ServiceProxyInterceptor())
          .filter(not(isDeclaredBy(Any::class.java)))
    )

    .make()
    .load(this)
    .loaded as Class<T>

And, finally, at the callee, I have several handlers, one for each service method, responsible for unmarshalling the invocation parameters and forwarding them to the service implementation.

@Service
class SomeServiceImpl {
    fun someMethod(arg0: String, arg1: SomePojo): PojoResult {
        // ...
    }
}

I could solve this problem using code generation, but the resulting jar file can become very big. Thus, I want to create a generic version of these handlers and, in each instance, attach a proxy that intercepts every method call to ISomeService and forwards them to SomeServiceImpl.