WD and EJBs

Hi,

Is there any information how exactly WebDynpro manages the synchronization of the data between the context end EJBs. Does it keep some permanent reference to the EJBHome or EJBObject or it instantiates them every time some synchronization is needed? What is the performance when too many EJBs are needed (for example when the information in the context is too much)?

Reagrds,

Metodi