[Patches] Patch 200%+ speedup of threads on Win32

Alan Klietz Alan Klietz" <alank@algintech.com
Sat, 13 May 2000 02:11:24 -0500 

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I was all set to send you a cool patch to thread_nt.h that eliminates the
round-trip into the kernel when acquiring an unclaimed lock on Windows
NT/9x.  The script runs in 25 seconds under the old method; under the new
method it runs in 9 seconds.  This was measured on a 450Mhz Pentium III.
Basically, the patch greatly speeds up the interpreter lock.

And now I find you guys did the same thing 7 days earlier!   Drat.

Well, my version doesn't depend on InterlockedCompareExchange(), which is
not available on Win95.  It also runs a bit faster (IMHO)  :-)

Alan Klietz
Algin Technology
alank@algintech.com

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#include <stddisclaimer>

I confirm that, to the best of my knowledge and belief, this
contribution is free of any claims of third parties under
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the extent that I have any such claims, I hereby grant to CNRI a
nonexclusive, irrevocable, royalty-free, worldwide license to
reproduce, distribute, perform and/or display publicly, prepare
derivative versions, and otherwise use this contribution as part
of the Python software and its related documentation, or any
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I acknowledge that CNRI may, at its sole discretion, decide
whether or not to incorporate this contribution in the Python
software and its related documentation.  I further grant CNRI
permission to use my name and other identifying information
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software and its related documentation.


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