[issue17025] reduce multiprocessing.Queue contention

[Charles-François Natali]

Charles-François Natali added the comment:

So, what do you think?
Is the simple version offloading the serialization to queue enough, or
should we go for a full-blown atomic Connection/Pipe/etc?

I find the performance gain quite appreciable (basically queue didn't
scale at all, now it scales with the number of cores).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17025>
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