[Python-Dev] Making python C-API thread safe (try 2)
skip at pobox.com
Sat Sep 13 17:09:05 CEST 2003
Mitch> Unlike Andrew I don't think the lack of maintenance for 1.4's
Mitch> free threading packages is due to any perception that threading
Mitch> performance is unimportant. It seems more likely that the
Mitch> packages were not updated because they proved not to solve the
Mitch> performance problems, and that no alternatives have emerged
Mitch> because the problem is hard to solve.
One reason (maybe the primary reason) it never went further than a patch to
1.4 was that it was slower in the (common) single-threaded case. Free
threading is no magic bullet. There is a lot of overhead in maintaining all
the fine-grained locks necessary to dispense with the GIL.
Mitch> Having said all of that, it looks like this thread originated on
Mitch> python-dev, rather than on c.l.py where I found it. So I'm
Mitch> probably missing some reasons for what appears to be a dismissive
Mitch> attitude toward Harri's efforts. I'll go read the python-dev
Python-dev is the place to discuss concrete proposals. Python-list is the
place to hash out ideas. Simple as that. You can read the few messages in
python-dev in the archive for September:
Search for "thread safe".
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