Profiler Speed

[dsimcha]

I'm working on optimizing some code now, and a nagging issue that I've been
meaning to bring up is how slow stuff runs when profiling is turned on.  It
seems that, given any code that's slow enough to be worth
profiling/optimizing, the DMD profiler slows it down further, to the point
where it's impractical to profile because it would take forever to get the
results.  Does anyone have any tips for speeding this up?