🚀 go-pugleaf

Another possible reason for problems with reading large polynomials
is this:

With ON DEFN, you can see what is actually read in:

a:= b**2 +x*y + 22*x*y**2;
(SETK
   'A
   (AEVAL
      (LIST
         'PLUS
         (LIST 'EXPT 'B 2)
         (LIST 'TIMES 'X 'Y)
         (LIST 'TIMES 22 'X (LIST 'EXPT 'Y 2)))) )

This is of course MUCH more expensive than the internal representation 
of the same expression. Also, this structure has to be kept in memory
while the denser representation is calculated.  Together with other
effects mentioned in earlier mails (loss of shared structures, to name
one), this could account for the problem.

Andreas Strotmann
Universitaet Koeln, Rechenzentrum
E-Mail:  Strotmann@RRz.Uni-Koeln.De