March 2002 - GiNaC-devel

GiNaC 1.0.8 now available
by Christian Bauer 31 Mar '02

31 Mar '02

Hello! Following our recent trend of Sunday evening releases we are proud to announce the immediate availability of GiNaC 1.0.8 which you can get from ftp://ftpthep.physik.uni-mainz.de/pub/GiNaC Changes include, but are not limited to - Improvements in memory usage of the expand() methods. Hm, wait... that's the only change!? <searches CVS logs> Aha, sorting of vector<expair> is a little faster, and the namespace fix for is_ex_the_function() is in. Alas, long gone now are the days of 0.9.x where changelog pages filled screen after screen... Bye, Christian -- / Coding on PowerPC and proud of it \/ http://www.uni-mainz.de/~bauec002/

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Possible memory leak? (was: update on fast mult benchmark (fwd))
by Pearu Peterson 29 Mar '02

29 Mar '02

Hi! I have tried to run Richard Fateman's multiplication benchmark also with GiNaC (1.0.2,1.0.6) but unsuccefully because expand() method starts to eat large amounts of memory so that I had to kill the process. Could this indicate a possible memory leak in GiNaC? Any other ideas? Here is my test program: #include <ginac/ginac.h> using namespace GiNaC; int main() { symbol x("x"), y("y"), z("z"); ex r = (ex(power(1 + x + y + z, 20 ))).expand(); ex r1 = r+1; ex m = (r*r1).expand(); return 0; } Regards, Pearu ---------- Forwarded message ---------- Date: Fri, 22 Mar 2002 16:01:01 -0800 From: Richard Fateman <fateman(a)cs.berkeley.edu> Newsgroups: sci.math.symbolic Subject: update on fast mult benchmark I've added some more programs. It looks like this now. MockMMA 5.8 seconds (including 2.1 in GC) Macsyma (in ACL 6.1) 6.9 seconds (including 2.0 in GC) Hashing 8.6 seconds (including 2.2 in GC) Fermat 9.2 seconds Macsyma (maxima5.5) 32.0 seconds (? GC not reported, second trial) Macsyma (commercial) 37.5 seconds (including 29.78 in GC) Macsyma (maxima5.5) 53.5 seconds (? GC not reported, first trial) Maple7 50.0 seconds (? GC, it was slower on 2nd trial) Mathematica 4.1 82.3 seconds (? it was slower on 2nd trial) MuPad 1.4.2 Pro 118.6 seconds for multiplying the expanded version of (1+x+y+z)^20 by itself. details on http://www.cs.berkeley.edu/~fateman/papers/fastmult.pdf comments invited. RJF

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Problem with `is_ex_the_function'
by Roberto Bagnara 22 Mar '02

22 Mar '02

Dear all, there is a bug in macro `is_ex_the_function' defined in ginac/function.h. As it is now, the macro only works if the file is included in a context where using declarations are in effect, since a couple of GiNaC:: qualifications are missing. I enclose a patch fixing the problem. All the best Roberto -- Prof. Roberto Bagnara Computer Science Group Department of Mathematics, University of Parma, Italy http://www.cs.unipr.it/~bagnara/ mailto:bagnara@cs.unipr.it diff -ru GiNaC-1.0.7.orig/ginac/function.h GiNaC-1.0.7/ginac/function.h --- GiNaC-1.0.7.orig/ginac/function.h Sun Jan 27 18:39:38 2002 +++ GiNaC-1.0.7/ginac/function.h Fri Mar 22 16:18:43 2002 @@ -416,7 +416,7 @@ } #define is_ex_the_function(OBJ, FUNCNAME) \ - (is_exactly_a<GiNaC::function>(OBJ) && ex_to<GiNaC::function>(OBJ).get_serial() == function_index_##FUNCNAME) + (GiNaC::is_exactly_a<GiNaC::function>(OBJ) && GiNaC::ex_to<GiNaC::function>(OBJ).get_serial() == function_index_##FUNCNAME) } // namespace GiNaC

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Annoying warning (II attempt)
by Roberto Bagnara 22 Mar '02

22 Mar '02

Dear all, there is a warning about an unused parameter due to line 84 in basic.h (GiNaC 1.0.7): virtual void destroy(bool call_parent) { } Having seen the warning two million times I thought it was better to report it ;-) Actually, I reported this problem already on February 2 but it seems I was not very successful. This time I enclose a patch fixing the problem. All the best Roberto -- Prof. Roberto Bagnara Computer Science Group Department of Mathematics, University of Parma, Italy http://www.cs.unipr.it/~bagnara/ mailto:bagnara@cs.unipr.it diff -ru GiNaC-1.0.7.orig/ginac/basic.h GiNaC-1.0.7/ginac/basic.h --- GiNaC-1.0.7.orig/ginac/basic.h Thu Jan 24 23:28:20 2002 +++ GiNaC-1.0.7/ginac/basic.h Fri Mar 22 16:35:07 2002 @@ -81,7 +81,7 @@ tinfo_key = other.tinfo_key; } /** For use by dtor and assignment operator. */ - virtual void destroy(bool call_parent) { } + virtual void destroy(bool /* call_parent */) { } // other ctors /** ctor with specified tinfo_key */

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And GiNaC-1.0.7 shall be made legion...
by Richard B. Kreckel 18 Mar '02

18 Mar '02

Its numbers shall be increased a thousand thousand fold. The din of a million keyboards like unto a great storm shall cover the earth, and the followers of Mammon shall tremble. adapted from The Book of Mozilla, 3:31 (Red Letter Edition)

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