Benchmark tracking

[Neil Jerram]

I've been running benchmarks for a while in my overnight builds, and
have put up a web page to show the results from that:

http://ossau.homelinux.net/~neil/

In summary, there's nothing to be concerned about (apart from a possible
slight slowdown in the last week or so).  The real point of this email
is just to mention this tracking - which I hope will help us notice if
we introduce significant performance gains or losses in the future.

If anyone has suggestions on how to present this information better or
differently, I'd be happy to hear them.

Regards,
        Neil