On 2008-02-07 14:09, Andrew MacIntyre wrote: > Probably in response to the same stimulus as Christian it occurred to me > that the freelist approach had been adopted long before PyMalloc was > enabled as standard (in 2.3), and that much of the performance gains > between 2.2 and 2.3 were in fact due to PyMalloc.
One of the hopes of having a custom allocator for Python was to be able to get rid off all free lists. For some reason that never happened. Not sure why. People were probably too busy with adding new features to the language at the time ;-) Something you could try to make PyMalloc perform better for the builtin types is to check the actual size of the allocated PyObjects and then make sure that PyMalloc uses arenas large enough to hold a good quantity of them, e.g. it's possible that the float types fall into the same arena as some other type and thus don't have enough "room" to use as free list. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Feb 08 2008) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
