When transferring a large number of objects (e.g. from a server to a client), 
in one call, then, after a predefined (4M?) limit, the internal buffer used in 
CDROutputStream is being re-allocated with a very small amount, so remaining 
data will be very slowly transferred (as the buffer is reallocated each time 
with that small amount).

A minimal solution would be to increase the buffer size with - for example - 
10% , right before BufferManager.getBuffer call, in CDROutputStream#check(int) 
method.