On Sat, Apr 14, 2012 at 5:28 PM, Greg Ewing <greg.ew...@canterbury.ac.nz> wrote: > Robert Bradshaw wrote: > >> Has anyone done any experiments/timings to see if having constants vs. >> globals even matters? > > > My gut feeling is that one extra memory read is going to be > insignificant compared to the time taken by the call itself > and whatever it does.
This is most valuable for really fast calls (e.g. a user-defined double -> double), and compilers (and processors) have evolved to a point that they're often surprising and difficult to reason about. > But of course gut feelings are always > better when backed up (or refuted!) by measurements. I agree with your gut feeling (where insignificant to me is <3%) but can't rule it out, and data trumps consensus :). > This is an aside, but is it really necessary to define the > signature syntax in a way that involves unmatched parens? > Some editors (such as the one I like to use) get confused > by this, even when they're inside quotes. > > The answer "get a better editor" would be entirely > appropriate if there were some advantage to this syntax, > over a non-unbalanced one, but I can't see any. Brevity, especially if the signature is inlined. (Encoding could take care of this by, e.g. ignoring the redundant opening, or we could just write di=d.) - Robert _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
