[issue20540] Python 3.3/3.4 regression in multiprocessing manager ?

[Charles-François Natali]

Charles-François Natali added the comment:

> Updated patch with the 3.2 heuristic for deciding when to concatenate.

LGTM.

For posterity, a quick benchmark performing 100 trivial remote calls:
Before:
$ ./python ~/test_manager.py
8.202659845352173

After:
$ ./python ~/test_manager.py
0.13146567344665527

Note that we're still behind the pre-rewrite performance (this is on 2.7):
$ ./python ~/test_manager.py
0.0707828998566

That's probably just the C->Python overhead, but I'll double-check.

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<http://bugs.python.org/issue20540>
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