On 26/07/2010 04:42, Guido van Rossum wrote:
On Sun, Jul 25, 2010 at 8:31 PM, Peter Portante
<peter.a.porta...@gmail.com> wrote:
FWIW: We use Python at Tabblo, straddled across Python 2.5.4 and 2.6.5. They
work. And they work well. But we make light use of threads (mostly
background I/O handling), and heavy use of multiple processes because we
can't take advantage of our multi-core systems otherwise.
Isn't this an indication that the GIL is, in fact, not (much of) a problem?
I wish those trying to get rid of the GIL well. But it may not be the
panacea some folks are hoping for. Multi-threaded programming remains
hard (and removing the GIL might actually make it harder).
Jython and IronPython don't have a GIL, and I think PyPy may not
either. Does anyone have experience with GIL-free programming in one
of those?
Oh, and PyPy does have a GIL but the developers say it wouldn't be a
huge amount of work to remove it.
Presumably they would have to add locking in the right places - which
would then impact performance. As PyPy doesn't use reference counting
adding locking shouldn't impact performance as much as previous attempts
with CPython have.
Michael
--
http://www.ironpythoninaction.com/
http://www.voidspace.org.uk/blog
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