From: Andy Wingo <wingo@pobox.com>
To: Ken Raeburn <raeburn@raeburn.org>
Cc: guile-devel <guile-devel@gnu.org>
Subject: Re: guile performance - Ackermann function: way slower than emacs, slower still if compiled
Date: Wed, 05 Aug 2009 13:15:37 +0200 [thread overview]
Message-ID: <m33a86pl46.fsf@pobox.com> (raw)
In-Reply-To: <CC607382-6167-422E-AD08-7BC3E6E55114@raeburn.org> (Ken Raeburn's message of "Tue, 4 Aug 2009 05:28:33 -0400")
Hi Ken,
Replying a lot :)
On Tue 04 Aug 2009 11:28, Ken Raeburn <raeburn@raeburn.org> writes:
> % time guile -c '(begin (load-compiled "ack.go") (ackermann 3 9))'
> 48.728u 22.016s 1:10.75 99.9% 0+0k 0+0io 0pf+0w
> %
>
> Not much better than loading the .scm file, and only better for small
> values of n... in fact, with m=3 and n>=6 the performance seems worse
> in the precompiled case:
I ran this under kcachegrind and it seems that the penalty is leaving
the VM for dispatching to `catch'. This is related to Daniel's issues
leaving the VM for dynamic-wind. So it seems that's what I should work
on.
There are a number of other little issues, but this is the big one.
Andy
--
http://wingolog.org/
prev parent reply other threads:[~2009-08-05 11:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-04 9:28 guile performance - Ackermann function: way slower than emacs, slower still if compiled Ken Raeburn
2009-08-04 13:52 ` Marijn Schouten (hkBst)
2009-08-04 15:56 ` Ken Raeburn
2009-08-05 9:06 ` Andy Wingo
2009-08-05 14:06 ` Ken Raeburn
2009-08-06 7:31 ` Ken Raeburn
2009-08-26 22:39 ` Neil Jerram
2009-08-06 16:30 ` entering and leaving guile mode, and GC stack protection (was Re: guile performance - Ackermann function: way slower than emacs, slower still if compiled) Ken Raeburn
2009-08-12 22:06 ` entering and leaving guile mode, and GC stack protection Andy Wingo
2009-08-14 7:58 ` Ludovic Courtès
2009-08-08 21:52 ` guile performance - Ackermann function: way slower than emacs, slower still if compiled Ludovic Courtès
2009-08-12 22:28 ` Andy Wingo
2009-08-05 10:42 ` Andy Wingo
2009-08-06 15:59 ` Andy Wingo
2009-08-07 17:27 ` Andy Wingo
2009-08-05 11:15 ` Andy Wingo [this message]
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