Profiler Speed

[Walter Bright]

Bill Baxter wrote:
> Right, that would probably do the trick, except I don't think there's
> anyway to programatically turn D's profiler on or off.  So if you've
> got a program with a big startup cost and you want to profile
> something that happens after startup, it means you could be waiting a
> long time to get to the thing you actually care about, and by that
> time the profile logs are filled up with a bunch of unrelated junk.
> 
> So I think your only hope with the D profile is to try to extract out
> the chunk you want to profile into a separate program.  Not always
> possible, and often when possible only painfully so.

You can do profiling for specific modules only by compiling just those 
modules with profiling on.