Consider sage: x,y,z=QQ['x','y','z'].gens() sage: u,v,w=W['u','v','w'].gens() sage: %timeit ((x+y+z)**3)(1/y,y,y**100) 10 loops, best of 3: 752 ms per loop <=== look here! sage: %timeit ((u+v+w)**3)(1/v,v,v**100) 10 loops, best of 3: 48.2 ms per loop <=== look here!
Conclusion: rational functions over the rationals are unusably slow at this time. I even know what the reason is. Rational functions over W do not support reduce so it is not called during the intermediate computations which happens to be a blessing. William: I know you can easily fix this yourself. If you are too busy would you be interested in a patch? I think this kind of janitorial work is important to improve the predictability of sage behaviour. Michel --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
