[issue27144] concurrent.futures.as_completed() memory inefficiency

[Grzegorz Grzywacz]

Grzegorz Grzywacz added the comment:

> We just ran into the exact same issue here in Google using a ThreadPoolExecutor.map call
Looks like map got simillar issue. I created GitHub PR with map fixed.

>  Concurrent package was added in 3.2. How backport it 2.7?
There is official, unofficial 2.7 backport.

Git: https://github.com/agronholm/pythonfutures
Pip: futures
Ubuntu package: python-concurrent.futures

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<http://bugs.python.org/issue27144>
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