Github messages for voidlinux
 help / color / mirror / Atom feed
From: tornaria <tornaria@users.noreply.github.com>
To: ml@inbox.vuxu.org
Subject: [ISSUE] maxima (sbcl) arithmetic is very slow
Date: Tue, 04 Jan 2022 20:19:22 +0100	[thread overview]
Message-ID: <gh-mailinglist-notifications-41a7ca26-5023-4802-975b-f1789d68868e-void-packages-34849@inbox.vuxu.org> (raw)

[-- Attachment #1: Type: text/plain, Size: 1979 bytes --]

New issue by tornaria on void-packages repository

https://github.com/void-linux/void-packages/issues/34849

Description:
Maybe coming from slow arithmetic in sbcl:
```
$ rmaxima
Maxima 5.45.1 https://maxima.sourceforge.io
using Lisp SBCL 2.1.10
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) showtime : true $
Evaluation took 0.0001 seconds (0.0000 elapsed) using 0 bytes.
(%i2) a : 10^(10^5) $
Evaluation took 0.0192 seconds (0.0200 elapsed) using 96.047 KB.
(%i3) b : a^10 $
Evaluation took 1.1198 seconds (1.1194 elapsed) using 1023.875 KB.
(%i4) b : a^20 $
Evaluation took 4.5570 seconds (4.5607 elapsed) using 2.147 MB.
(%i5) 
```

Contrast with maxima-ecl:
```
$ rmaxima -l ecl
;;; Loading #P"/usr/lib64/ecl-21.2.1/sb-bsd-sockets.fas"
;;; Loading #P"/usr/lib64/ecl-21.2.1/sockets.fas"
Maxima 5.45.1 https://maxima.sourceforge.io
using Lisp ECL 21.2.1
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) showtime : true $
Evaluation took 0.0000 seconds (0.0000 elapsed)
(%i2) a : 10^(10^5) $
Evaluation took 0.0030 seconds (0.0020 elapsed)
(%i3) b : a^10 $
Evaluation took 0.0420 seconds (0.0440 elapsed)
(%i4) b : a^20 $
Evaluation took 0.0680 seconds (0.0450 elapsed)
(%i5) b : a^40 $
Evaluation took 0.0750 seconds (0.0780 elapsed)
(%i6) b : a^80 $
Evaluation took 0.2420 seconds (0.2000 elapsed)
(%i7) b : a^160 $
Evaluation took 0.4430 seconds (0.3890 elapsed)
(%i8) b : a^320 $
Evaluation took 0.8530 seconds (0.7970 elapsed)
(%i9) b : a^640 $
Evaluation took 1.7850 seconds (1.7040 elapsed)
(%i10) ) b : a^1280 $
Evaluation took 3.7550 seconds (3.6670 elapsed)
(%i11) 
```

Note: ecl compiles with gmp so that's probably where the long arithmetic comes from.

             reply	other threads:[~2022-01-04 19:19 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-04 19:19 tornaria [this message]
2022-01-04 19:47 ` tornaria
2022-01-04 19:55 ` tornaria
2022-01-04 21:16 ` tornaria
2022-01-11 15:55 ` [ISSUE] [CLOSED] " leahneukirchen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=gh-mailinglist-notifications-41a7ca26-5023-4802-975b-f1789d68868e-void-packages-34849@inbox.vuxu.org \
    --to=tornaria@users.noreply.github.com \
    --cc=ml@inbox.vuxu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).