Improve execution time on Model deserialization

So I tried to migrate our usage of raw API calls to Microsoft Graph to your new release 1.1.0.
And I measured execution time with the bare-bones method time.time() before method call, time.time() after method call.

I've tried performing get requests for the endpoints: me, users, domains.

The results were that the sdk is on average 3.5 times slower than the raw call to API which I think a great deal.

Furthermore, I was curios where this overhead came from and I searched through the code with debug.
And the most time spent in execution is after the call to the rest api, when the sdk is building a model by deserializing the json object got from the request in a sdk specific object.

This execution time difference lead me to decide that I should postpone the migration until this is improved or fixed.

Inizia tracciando la deserializzazione dei modelli dell'SDK dopo la risposta REST, che l'issue identifica come la principale fonte di overhead. Riproduci il confronto riportato per gli endpoint me, users e domains; l'attività è completata quando viene dimostrata una riduzione misurabile del tempo di esecuzione rispetto alle chiamate dirette all'API.