Generic type subscription is a huge toll on Python performance #83349
Description
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = <Date 2020-07-05.16:03:53.763>
created_at = <Date 2019-12-30.17:17:10.478>
labels = ['3.7', '3.8', 'performance']
title = 'Generic type subscription is a huge toll on Python performance'
updated_at = <Date 2020-11-16.00:12:17.193>
user = 'https://bugs.python.org/RuslanDautkhanov'bugs.python.org fields:
activity = <Date 2020-11-16.00:12:17.193>
actor = 'gvanrossum'
assignee = 'none'
closed = True
closed_date = <Date 2020-07-05.16:03:53.763>
closer = 'gvanrossum'
components = []
creation = <Date 2019-12-30.17:17:10.478>
creator = 'Ruslan Dautkhanov'
dependencies = []
files = []
hgrepos = []
issue_num = 39168
keywords = ['patch']
message_count = 20.0
messages = ['359049', '359050', '359061', '359072', '359074', '359081', '359124', '359126', '359127', '359129', '359130', '359131', '359132', '373013', '373014', '373036', '381036', '381041', '381046', '381047']
nosy_count = 9.0
nosy_names = ['gvanrossum', 'levkivskyi', 'davidism', 'ZackerySpytz', 'miss-islington', 'Ruslan Dautkhanov', 'navdevl', 'calebj', 'Wouter De Borger']
pr_nums = ['21327', '21335']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue39168'
versions = ['Python 3.6', 'Python 3.7', 'Python 3.8']