Probably any benchmark involving a large amount of object instances with non-trivial dictionaries.
Benchmarks should measure memory usage too, of course. Sadly that is not possible in standard cPython. Our 2.7 branch has extensive patching to allow custom memory allocators to be used (it even eliminates the explicit "malloc" calls used here and there in the code) and exposes some functions, such as sys.getpymalloced(), useful for memory benchmarking. Perhaps I should write about this on my blog. Updating the memory allocation macro layer in cPython for embedding is something I'd be inclined to contribute, but it will involve a large amount of bikeshedding, I'm sure :) Btw, this is of great interest to me at the moment, our Shanghai engineers are screaming at the memory waste incurred by dictionaries. A 10 item dictionary consumes 1/2k on 32 bits, did you know this? K > -----Original Message----- > From: python-dev-bounces+kristjan=ccpgames....@python.org > [mailto:python-dev-bounces+kristjan=ccpgames....@python.org] On > Behalf Of R. David Murray > Sent: 23. apríl 2012 21:56 > To: Antoine Pitrou > Cc: python-dev@python.org > Subject: Re: [Python-Dev] cpython: Implement PEP 412: Key-sharing > dictionaries (closes #13903) > > On Mon, 23 Apr 2012 22:22:18 +0200, Antoine Pitrou <solip...@pitrou.net> > wrote: > > On Mon, 23 Apr 2012 17:24:57 +0200 > > benjamin.peterson <python-check...@python.org> wrote: > > > http://hg.python.org/cpython/rev/6e5855854a2e > > > changeset: 76485:6e5855854a2e > > > user: Benjamin Peterson <benja...@python.org> > > > date: Mon Apr 23 11:24:50 2012 -0400 > > > summary: > > > Implement PEP 412: Key-sharing dictionaries (closes #13903) > > > > I hope someone can measure the results of this change on real-world > > code. Benchmark results with http://hg.python.org/benchmarks/ are not > > overly promising. > > I'm pretty sure that anything heavily using sqlalchemy will benefit, so that > would be a good place to look for a real-world benchmark. > > --David > _______________________________________________ > 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/kristjan%40ccpgames.com _______________________________________________ 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
