Author yselivanov
Recipients giampaolo.rodola, gvanrossum, methane, mpaolini, serhiy.storchaka, vstinner, yselivanov
Date 2016-08-09.23:30:50
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> What parts of Future are performance critical? Maybe it is worth to implement in C only the most critical code.

Basically everything.  Contrary to @contextmanager, Futures are the building blocks of asyncio, so instantiation + awaiting on them + setting results must be fast.

To cover instantiation, I want to add a freelist for Futures, so this basically requires them to be implemented in C (and it's not a lot of C code actually).
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