Comment #9 on issue 1598 by ondrej.certik: New polynomials manipulation module http://code.google.com/p/sympy/issues/detail?id=1598
ok, first expand=False only speeds things up a bit for me (from 3.16s to 2.84s), however, this: $ SYMPY_GROUND_TYPES=gmpy bin/isympy Python 2.6.2 console for SymPy 0.7.0-git These commands were executed: >>> from __future__ import division >>> from sympy import * >>> x, y, z = symbols('xyz') >>> k, m, n = symbols('kmn', integer=True) >>> f, g, h = map(Function, 'fgh') Documentation can be found at http://sympy.org/ In [1]: a = (x+y+sin(z))**20 In [2]: b = a.expand() In [3]: %time c = factor(b, expand=False) CPU times: user 0.44 s, sys: 0.00 s, total: 0.44 s Wall time: 0.45 s makes it faster than sage! sage: var("x y z") (x, y, z) sage: a = (x+y+sin(z))**20 sage: b = a.expand() sage: %time c = factor(b) CPU times: user 0.15 s, sys: 0.01 s, total: 0.16 s Wall time: 0.59 s but that's because sage is using maxima if there is sin(x) in the expression. So that's really awesome. So let's rather compare this: $ SYMPY_GROUND_TYPES=gmpy bin/isympy Python 2.6.2 console for SymPy 0.7.0-git These commands were executed: >>> from __future__ import division >>> from sympy import * >>> x, y, z = symbols('xyz') >>> k, m, n = symbols('kmn', integer=True) >>> f, g, h = map(Function, 'fgh') Documentation can be found at http://sympy.org/ In [1]: a = (x+y+z)**20 In [2]: b = a.expand() In [3]: %time c = factor(b, expand=False) CPU times: user 0.40 s, sys: 0.00 s, total: 0.40 s Wall time: 0.40 s to this: sage: var("x y z") (x, y, z) sage: a = (x+y+z)**20 sage: b = a.expand() sage: %time c = factor(b) CPU times: user 0.14 s, sys: 0.00 s, total: 0.15 s Wall time: 0.15 s E.g. Sage (pari) is only about 2.6x faster. My lecture is on Thursday at 4pm, so if you can make it 3x faster with gmpy + Cython, then we can beat Sage. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---