gdb benchmarking and profiling

[Andrew Cagney]

> 
> That's a good point - it would be very interesting to add some
> machinery to monitor latency.  Collect milli/microsecond timings
> just above low-level calls, accumulate the amount of time spent
> waiting on turnarounds.  In fact, if you leave it in permanently
> and report it to users, it would help answer the why-is-stepping-
> slow-today-type questions.


Ah, that is easy, a trawler snapped the pacific/atlantic optic fiber 
cable (again) and the real world has been reduced to using carrier pigeons.

	Andrew