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Re: [Gcl-devel] Performance complaint from a user

From: Camm Maguire
Subject: Re: [Gcl-devel] Performance complaint from a user
Date: 29 Aug 2005 11:06:59 -0400
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

Greetings, and thanks for the pointer!

We may be able to address the non-null lexical environment if it is
deemed important.  But the remaining issues if any appear inaccessible
as the author states he is not publishing the test code.  Why not?  

I care a lot about GCL performance.  In general, time permitting, I
pledge my assistance in getting the best performance out of GCL for
any example code submitted.  What I'd need for this is of course the
source, and preferably the comparative timing information with gc
broken out for the compared systems in question.  If the systems are
other than cmucl and clisp (the ones I have installed), then a
disassembly of the code in those systems would be useful as well.  To
this end, perhaps sbcl is a better reference system than cmucl -- I've
never really understood why there are too different projects here.

Take care,

"Paul F. Dietz" <address@hidden> writes:

> Juho Snellman benchmarked some code he wrote for a Google
> programming project, and found gcl wasn't very good at
> all:
> http://www.cs.helsinki.fi/u/jesnellm/blog/archive/2005-08-27b.html
> He told me the biggest problem was gcl wasn't able to compile
> defuns in non-null lexical environments:
> ;; compile-file didn't do well on this
> (let ((x ni))
>    (defun foo () ...)
>    (defun bar () ...)
>    ...)
> Even after he fixed that (with special variables) it was still
> rather more slow than sbcl or cmucl.  I'd like to see where
> the performance bottleneck is for further tuning.
>       Paul
> _______________________________________________
> Gcl-devel mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/gcl-devel

Camm Maguire                                            address@hidden
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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