Future directions

[Hal Murray]

> Another is that you can allow anyone on the localhost to read the SHM without
> any risk of them messing up the SHM data.

Good point.

> It is also fast since it is memory mapped.  No system call overhead. 

CPU cycles aren't important for refclocks.  (at least within reason)

The disadvantage of SHM is that there is no way to wake up a reader when new 
data is available.  Readers have to poll.

-- 
These are my opinions.  I hate spam.