rmt as a bottleneck - Was: Weird behaviour of AIT-3 and (g)tar

[Bruce Evans]

> Observe that I bypassed rmt; that bumped the transfer rate to 10.976.153,96 
> Bytes/s, almost 30x faster. Should this really happen? (And yes, I read 
> rmt(8), but found nothing about this. :(  ).
> Thanks for your help;

ISTR that remote tars have a delay of 10 msec or so for each block because
the protocol needs to talk after each block (it doesn't stream) and there
is a TCP startup delay of this amount.

Bruce