On 01.06.2015 12:44, Armin Rigo wrote: > Hi Larry, > > On 31 May 2015 at 01:20, Larry Hastings <la...@hastings.org> wrote: >> p.s. Supporting this patch also helps cut into PyPy's reported performance >> lead--that is, if they ever upgrade speed.pypy.org from comparing against >> Python *2.7.2*. > > Right, we should do this upgrade when 2.7.11 is out. > > There is some irony in your comment which seems to imply "PyPy is > cheating by comparing with an old Python 2.7.2": it is inside a thread > which started because "we didn't backport performance improvements to > 2.7.x so far". > > Just to convince myself, I just ran a performance comparison. I ran > the same benchmark suite as speed.pypy.org, with 2.7.2 against 2.7.10, > both freshly compiled with no "configure" options at all. The > differences are usually in the noise, but range from +5% to... -60%. > If anything, this seems to show that CPython should take more care > about performance regressions. If someone is interested: > > * "raytrace-simple" is 1.19 times slower > * "bm_mako" is 1.29 times slower > * "spitfire_cstringio" is 1.60 times slower > * a number of other benchmarks are around 1.08. > > The "7.0x faster" number on speed.pypy.org would be significantly > *higher* if we upgraded the baseline to 2.7.10 now.
If someone were to volunteer to set up and run speed.python.org, I think we could add some additional focus on performance regressions. Right now, we don't have any way of reliably and reproducibly testing Python performance. Hint: The PSF would most likely fund such adventures :-) -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jun 01 2015) >>> Python Projects, Coaching and Consulting ... http://www.egenix.com/ >>> mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ ::::: Try our mxODBC.Connect Python Database Interface 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 http://www.egenix.com/company/contact/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
