2008/6/20 Kevin Jacobs <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>: > On Fri, Jun 20, 2008 at 10:25 AM, Antoine Pitrou <[EMAIL PROTECTED]> > wrote: >> >> Kevin Jacobs <jacobs <at> bioinformed.com> <bioinformed <at> gmail.com> >> writes: >> > >> > +1 on a C API for enabling and disabling GC. I have several instances >> > where >> I create a large number of objects non-cyclic objects where I see huge GC >> overhead (30+ seconds with gc enabled, 0.15 seconds when disabled). >> >> Could you try to post a stripped-down, self-contained example of such >> behaviour? > > $ python -m timeit 'zip(*[range(1000000)]*5)' > 10 loops, best of 3: 496 msec per loop > > $ python -m timeit -s 'import gc; gc.enable()' 'zip(*[range(1000000)]*5)' > 10 loops, best of 3: 2.93 sec per loop
I remember that a similar issue was discussed some months ago: http://bugs.python.org/issue2607 In short: the gc is tuned for typical usage. If your usage of python is specific, use gc.set_threshold and increase its values. -- Amaury Forgeot d'Arc _______________________________________________ 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
