mallopt (Re: [Python-Dev] Minor compilation problem on HP-UX (1.6b1) (fwd)) (original) (raw)

Vladimir Marangozov Vladimir.Marangozov@inrialpes.fr
Mon, 7 Aug 2000 14:59:49 +0200 (CEST)

Jack Jansen wrote:

_> + #ifdef hpux > + mallopt (MMXFAST, 512); _> + #endif /* hpux */ > + After reading this I went off and actually read the mallopt manpage for the first time in my life, and it seems there's quite a few parameters there we might want to experiment with. Besides the MMXFAST there's also MGRAIN, MBLKSIZ, MMXCHK and MFREEHD that could have significant impact on Python performance. I know that all the tweaks and tricks I did in the MacPython malloc implementation resulted in a speedup of 20% or more (including the cache-aligment code in dictobject.c).

To start with, try the optional object malloc I uploaded yestedray at SF. [Patch #101104]

Tweaking mallopt and getting 20% speedup for some scripts is no surprise at all. For me . It is not portable though.

-- Vladimir MARANGOZOV | Vladimir.Marangozov@inrialpes.fr http://sirac.inrialpes.fr/~marangoz | tel:(+33-4)76615277 fax:76615252