> Reason seems to be in socket default receive and send buffer sizes.
> Right now I do not have a solution, but for your case buffers of 16k
> give the best performance (same as InterClient). You can fix driver by
> adding following lines into org.firebirdsql.jgds.GDS_Impl (line 1496):
>
> db.socket.setReceiveBufferSize(16 * 1024);
> db.socket.setSendBufferSize(16 * 1024);

Well, Roman, things look to be harder -
I recompiled driver with your corrections but figures did not changed.

Thanks,
Sergei Volin.