[Gcl-devel] Hhmmm

[Eric]

Dear Camm,

I'm skeptical. None of this (below) explains why I
don't see any difference in the performance of GCL
with/without function prototypes, so that the compiler
can pass function parameters on the C stack vs. the
heap. This is the central question at the moment.

Your response to my very first email emphatically
states that you have done it, i.e. achieved a
difference in the performance of GCL with/without
function prototypes. Yet, you can't explain to me the
procedure for accomplishing this. I'm confused.

Best regards,

Eric

--- Camm Maguire <address@hidden> wrote:
> 1) Can you send me your file?  Pretty hard to help
> with so little
>    information. 
> 
> 2) Speed differences of this magnitude are almost
> always due to
>    garbage collection.  (setq si::*notify-gbc* t) to
> find out.  Also
>    look at (si::gbc-time) and its info page.  If so,
> make sure you
>    declare the types of your variables where
> possible.
> 
> 3) gcl-2.6.1 and above comes with a profiling
> option.  Compile with
>    --enable-gprof, then bracket your code with
> (si::gprof-start) and
>    (si::gprof-quit). 
> 
> 4) I don't know what your lisp is, but I'm
> reasonably confident that
>    your performance issues are far more basic than
> those related to
>    fine tuning compiler switches.