Thanks, that does answer my questions. I'm not an expert, but I did find the possibility of speeding up python this much was an interesting one.
Let's hope they'll succeed, though I guess it may take them years. I hope they are in it for the long run. Bill. On 28 Mar, 01:45, Carl Witty <carl.wi...@gmail.com> wrote: > On Fri, Mar 27, 2009 at 4:35 PM, Bill Hart <goodwillh...@googlemail.com> > wrote: > > > Not to press the point, but isn't: > > > "Our long-term proposal is to replace CPython's custom virtual machine > > with a JIT built on top of LLVM, while leaving the rest of the Python > > runtime relatively intact." > > > the explanation of how they propose to get some speed out of it. In > > other words they are using a technologically superior method of > > interpreter operation. I'm interested to know if you have an opinion > > on that. > > Well, just reading that paragraph isn't enough... replacing ceval.c > with an LLVM-based JIT in a straightforward way should be more-or-less > equivalent to Cython's performance on pure-Python code (that is, the > speedup is much less than 2x). > > You really need type information to do much better; fortunately, they > do plan to use type information (either using type annotations, or by > guessing that the types will likely be the same every time the code is > executed). > > I'm pretty sure that Javascript implementations have speed up by more > than 5x in the last year; IMHO similar speedups should be possible for > Python. (Whether this is possible while remaining 100% compatible > with current Python source and extension modules is another question.) > > Carl --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
