On Tue, May 17, 2011 at 1:24 PM, Armin Rigo <ar...@tunes.org> wrote: > Hi David, > > On Sun, May 15, 2011 at 5:21 PM, Armin Rigo <ar...@tunes.org> wrote: >>> Did you try this with PyPy 1.5 or a recent nightly? I thought that the new >>> type __dict__ implementation should have fixed the problem? >> >> Indeed, with a recent PyPy things are much better. My example >> still takes 1.5x time the time it takes on CPython 2.7, though... > > Well, I cannot reproduce this number... I have no clue how I got it :-( > > The original code you posted is actually not relevant to the JIT: it > contains no loop. The fact is that it is still 2-3x faster on PyPy > than CPython, for GC reasons: our GC is better at handling quickly > growing heaps, and the allocated objects are much smaller anyway. > > The code I posted used to be really slow in pypy-1.5, because it was > trying again and again to JIT it. Now we fixed the issue, and it is > again much faster than CPython (this time, about 10x).
Might be CPython 2.6 vs CPython 2.7? There were significant GC changes in 2.7, especially when it comes to O(n^2) behavior. > > > A bientôt, > > Armin. > _______________________________________________ > pypy-dev mailing list > pypy-dev@python.org > http://mail.python.org/mailman/listinfo/pypy-dev > _______________________________________________ pypy-dev mailing list pypy-dev@python.org http://mail.python.org/mailman/listinfo/pypy-dev
