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Created on 2018-02-25 08:46 by serhiy.storchaka, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 5873 | merged | serhiy.storchaka, 2018-02-25 09:05 | |
| Messages (2) | |||
|---|---|---|---|
| msg312781 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) *  |
Date: 2018-02-25 08:46 | |
The proposed PR optimizes "from ... import ..." from non-package modules. $ ./python -m perf timeit 'from locale import getlocale' Unpatched: Mean +- std dev: 811 ns +- 27 ns Patched: Mean +- std dev: 624 ns +- 17 ns Currently _bootstrap._handle_fromlist() is called which does nothing if the module is not a package, but adds an overhead of calling a Python function. The PR moves this check out of _handle_fromlist and avoid calling it if not needed. |
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| msg313587 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2018-03-11 08:52 | |
New changeset 4e2442505c5e9eec396dcef4d2e6bdd2b6f92fc9 by Serhiy Storchaka in branch 'master': bpo-32946: Speed up "from ... import ..." from non-packages. (GH-5873) https://github.com/python/cpython/commit/4e2442505c5e9eec396dcef4d2e6bdd2b6f92fc9 |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:58 | admin | set | github: 77127 |
| 2018-03-11 08:58:13 | serhiy.storchaka | set | status: open -> closed resolution: fixed stage: patch review -> resolved |
| 2018-03-11 08:52:41 | serhiy.storchaka | set | messages: + msg313587 |
| 2018-02-25 09:05:43 | serhiy.storchaka | set | keywords:
+ patch stage: patch review pull_requests: + pull_request5646 |
| 2018-02-25 08:46:54 | serhiy.storchaka | create | |