Adding memory info to "usertest"

[Ian Clatworthy]

John Arbash Meinel wrote:

> So I'd like to get some ideas about how you think it would be good to
> incorporate it. I'm wondering if peak memory measurements should be part
> of every run, or if it should be a separate set of 'memory benchmarks'
> that we run.

I think that's a great idea.

If there's a performance overhead to collecting the memory figures, I'd
make it a separate run. Otherwise we can do it all at once and produce
either a single report or maybe two reports: one for times, one for memory.

Ian C.