Exponentiation used in division? & Some extrordinary slowness is some problems.

I've decided to try modedeclare. If I remember correctly, I could not 
use bfloat in declare_variable either. I will
try to isolate the changes however. I only have one program to generate 
c, c++, Ruby, Maxima or Maple.

Dennis Darland
student at dennisdarland.com

On 12/31/2013 11:08 AM, Robert Dodier wrote:
> On 2013-12-31, Dennis Darland - student <student at dennisdarland.com> wrote:
>
>> I do not expect maxima to be comparable to c at number crunching,
>> but there are two examples in my tests that it appears would take over
>> one day to complete using maxima, but take only 4 and 5 seconds
>> respectively in c.
> A major factor is that Maxima is probably doing something much more
> general than necessary. Speeding up the code would require recognizing
> that a special case is possible and then exploiting it. Maxima has some
> machinery for that, but it is clumsy to use and not terribly effective.
> I certainly agree that getting Maxima to run faster is a good idea, but
> at present we (developers) are mostly concerned with trying to get it
> to run correctly first. If you would like to work on speed, though, you
> are more than welcome to do so.
>
> best
>
> Robert Dodier
>
> _______________________________________________
> Maxima mailing list
> Maxima at math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima