On Apr 1, 2008, at 10:45 AM, Nick Alexander wrote: > On 1-Apr-08, at 10:36 AM, Gary Furnish wrote: > >> Right now pulling in group theory may end up pulling in calculus. >> There are similar issues all over with really tight coupling >> between subsystems. It ought to be possible to use group theory >> (maybe without a feature or two) without calculus and vice versa. > > This isn't really a global namespace pollution issue, but it is a > concern. One way to deal with this is to make (more) imports > function or class local. I'm not sure if there are performance > penalties for this, especially in Cython. Can anyone say?
Importing locally takes time, even if just to discover the cached import if it has already been done once. This is independent of whether or not the file is in Cython (though the relative overhead may be much greater for a Cythonized function). The order in which things are imported is really, really crazy right now, as anyone trying to hunt down an (easy to trigger) circular references can attest to. It would be great if this could be cleaned up, both for developing Sage and for making things more modular so other projects can benefit from them. - Robert --~--~---------~--~----~------------~-------~--~----~ 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://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
