[-- 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.

[-- Attachment #1: Type: text/plain, Size: 669 bytes --] New comment by tornaria on void-packages repository https://github.com/void-linux/void-packages/issues/34849#issuecomment-1005120770 Comment: This seems to be due to slow default arithmetic in sbcl: ``` $ sbcl This is SBCL 2.2.0, an implementation of ANSI Common Lisp. [...] * (* 0 (expt (expt 10 (expt 10 5)) 30)) [takes ~ 10s] 0 ``` Now ``` $ sbcl This is SBCL 2.2.0, an implementation of ANSI Common Lisp. [...] * (require :sb-gmp) ("SB-GMP") * (sb-gmp:install-gmp-funs) * (* 0 (expt (expt 10 (expt 10 5)) 30)) [takes < 0.5 s]] 0 ``` The solution might be to somehow link maxima to `sb-gmp` and run `(sb-gmp:install-gmp-funs)` at startup.

[-- Attachment #1: Type: text/plain, Size: 1176 bytes --] New comment by tornaria on void-packages repository https://github.com/void-linux/void-packages/issues/34849#issuecomment-1005125647 Comment: Indeed: ``` $ rmaxima Maxima 5.45.1 https://maxima.sourceforge.io using Lisp SBCL 2.2.0 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) :lisp (require :sb-gmp "/usr/lib/sbcl/contrib/sb-gmp.fasl") (SB-GMP) (%i1) :lisp (sb-gmp:install-gmp-funs) (%i1) showtime : true $ Evaluation took 0.0001 seconds (0.0000 elapsed) using 0 bytes. (%i2) a : 10^(10^5) $ Evaluation took 0.0015 seconds (0.0010 elapsed) using 3.578 KB. (%i3) b : a^1280 $ Evaluation took 1.5059 seconds (1.5080 elapsed) using 50.689 MB. (%i4) ``` Caveats: - this only works if `sbcl` is installed (for the file "/usr/lib/sbcl/contrib/sb-gmp.fasl") - moreover the version of sbcl used to compile maxima has to match the version of sbcl used to compile `sb-gmp.fasl` (rn maxima was compiled with 2.1.11 but sbcl is at 2.2.0) - the "require" statement needs the full path to `sb-gmp.fasl` (not a real problem)

[-- Attachment #1: Type: text/plain, Size: 1483 bytes --] New comment by tornaria on void-packages repository https://github.com/void-linux/void-packages/issues/34849#issuecomment-1005176605 Comment: I had success with the following patch ``` --- a/src/init-cl.lisp 2021-05-15 20:20:53.000000000 -0300 +++ b/src/init-cl.lisp 2022-01-04 17:45:03.838273626 -0300 @@ -574,8 +574,13 @@ (delete-file file))))) *temp-files-list*)) +#+sbcl +(eval-when (:compile-toplevel :load-toplevel :execute) + (require 'sb-gmp)) + (defun cl-user::run () "Run Maxima in its own package." + #+sbcl (sb-gmp:install-gmp-funs) (in-package :maxima) (initialize-runtime-globals) (let ((input-stream *standard-input*) ``` Now maxima is automatically initialized using sb-gmp and arithmetic is fast: ``` $ rmaxima Maxima 5.45.1 https://maxima.sourceforge.io using Lisp SBCL 2.2.0 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 0.0017 seconds (0.0020 elapsed) using 13.516 KB. (%i3) b : a^1280 $ Evaluation took 1.5245 seconds (1.5270 elapsed) using 50.689 MB. (%i4) ``` I want to try to fix an (unrelated) bug with the heap on maxima-ecl (https://github.com/void-linux/void-packages/pull/34030#issuecomment-1005080267); I'll make a single PR with both.

[-- Attachment #1: Type: text/plain, Size: 1982 bytes --] Closed 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.