[Stackless] Ann: Stackless Psyco

Hi friends, I am right now in Reykjavik, working on Stackless and Psyco for CCPgames. http://www.ccpgames.com They want a 64 bit version of Psyco, and I had to do some prototyping of stackless/psyco collaboration, to see if it makes sense at all. I think I got this done so far. Try out Stackless with Psyco!!! ------------------------------- Stackless is unchanged, Psyco was enhanced to work with all versions of Stackless. Right now, psyco for stackless is sitting in a private subfolder on codespeak. This is only intermediate, psyco.org will be the main site soon. If you checked out psyco before, you only need to svn update and you will find a 'private' subfolder. It contains the not yet published norman project with all the changes from last year, and the new stackless support. For first checkout, use this: svn checkout http://codespeak.net/svn/psyco/v2/private/norman build it with setup.py, or add the supplied project file to your Visual Studio solution. In order to set it up without an extra directory, you can copy the py-support folder, renaming it to psyco. Adjust your python path, to include the directory that contains the psyco folder. Compatibility ------------- - No softswitching Stackless Psyco does not work with softswitching. You can enable it, but psyco will do all compilation with softswitching suppressed. That is, you loose the ability to pickle tasklets when psyco is active. This will be improved in the future. Stackless will grow a new switching mode that is supported by psyco. - become and capture After you import psyco, the methods tasklet.become and tasklet.capture become useless. They are changed into D:\ccp\2.5\PCbuild8>lib\VC90.SP1\Win32\python_d.exe Python 2.5.3a0 Stackless 3.1b3 060516 (release25-maint, Apr 16 2010, 00:14:17) [ MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import psyco, stackless [34782 refs] >>> stackless.tasklet.become NotImplemented [34784 refs] >>> Ideally, I would have removed these methods. They are going away, and they are nearly impossible to support in Psyco. But it is not possible, because Stackless uses flextype, a different approach to make builtin bethods efficiently overridable. This was years before the descriptor protocol was introduced. flextype will go away, but until then, it needs to stay so. - cframes I had to tell psyco about cframes, because they show up in the Stackless generator implementation. cframes are going away, too. They were introduced as a speed boost. But speed is the domain of psyco, and everything written in Python will get sped up for free. Future ------ Stackless will gradually morph away in a more compatible way, and eventually become an extension module like Psyco. This is a long path to go. It will grow a new switching mode that is soft, but requires no rewrite of the core functions. This switching mode will get full psyco support and acceleration. Psyco will support 64 bit. Not sure under what license, yet ;-) stay tuned -- chris -- Christian Tismer :^)<mailto:tismer at stackless.com> tismerysoft GmbH : 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 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/