Subject: maxima is more than 500 times slower than maple
From: Valery Pipin
Date: Wed, 24 Apr 2013 10:18:44 -0700
> My guess is that you are doing a vastly different computation, perhaps
> repeating unnecessary simplifications,
> in your Maxima specifications. Nevertheless, the Maple computation
> would ordinarily be somewhat faster.
>
> I'm not sure what you wish to accomplish by expand() or ratsimp.
>
> For example, expand((a+b+c+d)^30) takes 0.83 seconds but
> rat((a+b+c+d)^30) takes 0.05 seconds.
>
> I think that Valery Pipin's response excludes the (commented out)
> long-running command at the end.
Indeed, that is right. If it is included
calculation is finished with ldb :
0
(%i21) ddelta : ratsimp(subst([SK4uu[b,a]=SK4uu[a,b],
SK4uu[c,a]=SK4uu[a,c], SK4uu[c,b]=SK4uu[b,c]], ddelta))$
Heap exhausted during garbage collection: 0 bytes available, 16 requested.
Gen StaPg UbSta LaSta LUbSt Boxed Unboxed LB LUB !move Alloc
Waste Trig WP GCs Mem-age
0: 0 0 0 0 0 0 0 0 0 0 0
10737418 0 0 0.0000
.....