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bpo-33652: Improve pickle support in the typing module.#7123

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ilevkivskyi merged 1 commit into
python:masterfrom
serhiy-storchaka:typing-pickle
May 26, 2018
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bpo-33652: Improve pickle support in the typing module.#7123
ilevkivskyi merged 1 commit into
python:masterfrom
serhiy-storchaka:typing-pickle

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@serhiy-storchaka

@serhiy-storchaka serhiy-storchaka commented May 26, 2018 •
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Pickles of type variables and subscripted generics are now future-proof and compatible with older Python versions.

https://bugs.python.org/issue33652

@serhiy-storchaka
bpo-33652: Improve pickle support in the typing module. …
57b65ae 
Pickles of type variables and subscripted generics are now future-proof
and compatible with older Python versions.
ilevkivskyi
ilevkivskyi reviewed May 26, 2018
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LGTM! I don't see any problems with this implementation. Only one concern is operator module loading time. People complained that typing slows down application startup, and operator is not that often imported nowadays. Did you make any measurements of import time with this PR?

@serhiy-storchaka

serhiy-storchaka commented May 26, 2018

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The import time of typing varies from 8.3 to 9.7 ms (when run ./python -X importtime -c 'import typing' several times sequentially). Importing operator takes 0.35 ms (around 4% of total time), but it is imported by collections in any case, and therefore this PR doesn't affect the import time.

ilevkivskyi
ilevkivskyi approved these changes May 26, 2018
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but it is imported by collections in any case, and therefore this PR doesn't affect the import time.

Ah, OK then!

@ned-deily ned-deily removed their request for review May 26, 2018 12:56
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ned-deily commented May 26, 2018

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I'm OK with merging this for 3.7 if @ilevkivskyi and/or @gvanrossum are/is.

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ilevkivskyi commented May 26, 2018 •
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I am fine with backporting this to 3.7.

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gvanrossum commented May 26, 2018

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Yes, fine with me to for the backport.

@ilevkivskyi ilevkivskyi merged commit 09f3221 into python:master May 26, 2018
@miss-islington

miss-islington commented May 26, 2018

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Thanks @serhiy-storchaka for the PR, and @ilevkivskyi for merging it 🌮🎉.. I'm working now to backport this PR to: 3.7.
🐍🍒⛏🤖

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GH-7132 is a backport of this pull request to the 3.7 branch.

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request May 26, 2018
@serhiy-storchaka @miss-islington
bpo-33652: Improve pickle support in the typing module. (pythonGH-7123) …
46fcdec 
Pickles of type variables and subscripted generics are now future-proof
and compatible with older Python versions.
(cherry picked from commit 09f3221)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
miss-islington added a commit that referenced this pull request May 26, 2018
@miss-islington @serhiy-storchaka
bpo-33652: Improve pickle support in the typing module. (GH-7123) …
d498625 
Pickles of type variables and subscripted generics are now future-proof
and compatible with older Python versions.
(cherry picked from commit 09f3221)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
@serhiy-storchaka serhiy-storchaka deleted the typing-pickle branch July 7, 2018 21:55
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