Alan Mackenzie <acm@muc.de> writes:

> Presumably, you got some results in one of Emacs's profilers.  Any chance
> you could post the profiler report?
>
> Is there anything unusual about the C Mode files?  For example, are they
> very big, have lots of long lines, or exceptionally long macros defined
> in them?  Or something like that.

I've attached the profiler report.  You can open it with
`profiler-find-profile'.

> Of course, if you were able to send one of these files to me that
> would help enormously, but I suspect you can't.

Unfortunately not, I'm sorry.

> There is a cache used directly in c-find-decl-spots, one that tracks
> whether or not the source code is at top-level (including being directly
> within things like a C++ class or namespace).  Maybe this isn't working
> as desired, as you suggest.

Perhaps.  How do I debug this?

Thanks a lot for the help!