In case of toArray(), Storable* delegates are loaded from the database/populated
eagerly, during Handler construction. Since a Handler keeps only a
(soft)reference to the storable, it's not unusual that the Storable is dropped
in the meantime, which introduces another deserialization process.

I suggest to change the implementation to either of the following:
1. allow construction of Handler without loading the storable - to avoid eager
loading
2. keep the Storable in memory for Handler's lifetime - to avoid multiple loads
of the Storable referencable from MDR clients.