From: Christian T. <ti...@st...> - 2004-04-29 15:44:38
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Armin Rigo wrote: > Hello, > > I have put on-line some slides from the Python UK conference at ACCU 2004, > explaining how Psyco works. It is actually a Pygame application... As far as > I can tell, it is the first time someone in the room actually understood > something at the end :-) > > http://psyco.sourceforge.net/ Hey, *this* is a nice animation, with my beloved Lemmings :-) > I hope it should help to make Psyco a bit less mysterious, and also explain > why it is difficult to have a general idea about what kind of speed-up you can > expect for specific kinds of code: it is, after all, a pretty low-level > "local" process that Psyco does, and it sometimes pays off and sometimes not. > It also explains why this process is very much like the usual interpretation > that CPython does. If you think about it you might see how useful it would be > for Psyco to build on top of an interpreter in a better language than C (i.e. > one that can be analysed, not just blindly run). Yes, this is very clear. For PyPy, it will be interesting to see how efficient Psyco's peephole-like optimization is compared to whole-program analysis. There are probably programs simple enough to be completely optimized through by WPA. On the other hand, the possible optimization paths can grow to very many, giving a huge code bloat. In that case, Psyco's approach is probably more efficient, by creating new code only when it is needed. In the end, I guess both strategies should be combined to get some optimum between analysis time, speed and memory consumption. Anyway, I can highly recommend to watch this nice movie from Rigo Productions (C) :-)) ciao - chris -- Christian Tismer :^) <mailto:ti...@st...> Mission Impossible 5oftware : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9a : *Starship* http://starship.python.net/ 14109 Berlin : PGP key -> http://wwwkeys.pgp.net/ work +49 30 89 09 53 34 home +49 30 802 86 56 mobile +49 173 24 18 776 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/ |