On Sat, Dec 3, 2016 at 10:53 PM, Ralf Stephan <> wrote:
“Both ZZ and numpy use libgmp internally “
No, ZZ uses libgmp (actually really MPIR, which is a fork of GMP), and
numpy uses Python’s ints/longs. Python’s int/long type is arbitrary
precision, despite the confusing naming. It only implements
On Sunday, December 4, 2016 at 5:58:45 PM UTC+1, Pierre wrote:
> -- numpy.int32 or int.64: like "int" initially, but works mod 2^32 or
> 2^64, and gives an overflow warning when it happens. No increase in
> speed, for general reasons which I will just call "overhead" for lack
> of a better unde
PPS come to think of it, my last PS explains it all. So in summary:
-- ZZ= always arbitrary precision.
-- int= a C int when the numbers stay < 2^64, so there is an increase
of speed -- but not nearly as much of an increase as I expected, which
is why I was confused at first, because I wasn't seein
