[issue8299] Improve GIL in 2.7

[David Beazley]

David Beazley <dave at dabeaz.com> added the comment:

One other comment.  Running the modified fair.py file on my Linux system using Python compiled with semaphores shows they they are *definitely* not fair.  Here's the relevant part of your test:

Treaded, balanced execution, with quickstop:
fast C: 1.580815 (0 left)
fast B: 1.636923 (158919 left)
fast A: 1.788634 (310323 left)

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