Le samedi 4 janvier 2014 15:17:40 UTC+1, Chris Angelico a écrit : > On Sun, Jan 5, 2014 at 12:55 AM, Roy Smith <r...@panix.com> wrote: > > > In article <mailman.4882.1388808283.18130.python-l...@python.org>, > > > Mark Lawrence <breamore...@yahoo.co.uk> wrote: > > > > > >> Surely everybody prefers fast but incorrect code in > > >> preference to something that is correct but slow? > > > > > > I realize I'm taking this statement out of context, but yes, sometimes > > > fast is more important than correct. Sometimes the other way around. > > > > More usually, it's sometimes better to be really fast and mostly > > correct than really really slow and entirely correct. That's why we > > use IEEE floating point instead of Decimal most of the time. Though > > I'm glad that Python 3 now deems the default int type to be capable of > > representing arbitrary integers (instead of dropping out to a separate > > long type as Py2 did), I think it's possibly worth optimizing small > > integers to machine words - but mainly, the int type focuses on > > correctness above performance, because the cost is low compared to the > > benefit. With float, the cost of arbitrary precision is extremely > > high, and the benefit much lower. > > > > With Unicode, the cost of perfect support is normally seen to be a > > doubling of internal memory usage (UTF-16 vs UCS-4). Pike and Python > > decided that the cost could, instead, be a tiny measure of complexity > > and actually *less* memory usage (compared to UTF-16, when lots of > > identifiers are ASCII). It's a system that works only when strings are > > immutable, but works beautifully there. Fortunately Pike doesn't have > > any, and Python has only one, idiot like jmf who completely > > misunderstands what's going on and uses microbenchmarks to prove > > obscure points... and then uses nonsense to try to prove... uhh... > > actually I'm not even sure what, sometimes. I wouldn't dare try to > > read his posts except that my mind's already in a rather broken state, > > as a combination of programming and Alice in Wonderland. >
I do not mind to be considered as an idiot, but I'm definitively not blind. And I could add, I *never* saw once one soul, who is explaining what I'm doing wrong in the gazillion of examples I gave on this list. --- Back to ReportLab. Technically I would be really interested to see what could happen at the light of my previous post. jmf -- https://mail.python.org/mailman/listinfo/python-list
