Speedup empty dict creation and reduce its memory usage #74226
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 2019-03-18.11:46:24.978>
created_at = <Date 2017-04-11.09:39:20.110>
labels = ['interpreter-core', '3.8', 'performance']
title = 'Speedup empty dict creation and reduce its memory usage'
updated_at = <Date 2019-10-19.15:00:56.151>
user = 'https://github.com/methane'bugs.python.org fields:
activity = <Date 2019-10-19.15:00:56.151>
actor = 'pablogsal'
assignee = 'none'
closed = True
closed_date = <Date 2019-03-18.11:46:24.978>
closer = 'methane'
components = ['Interpreter Core']
creation = <Date 2017-04-11.09:39:20.110>
creator = 'methane'
dependencies = []
files = []
hgrepos = []
issue_num = 30040
keywords = ['patch']
message_count = 34.0
messages = ['291470', '291471', '291477', '291481', '291482', '291483', '291485', '291489', '291494', '291506', '291507', '291521', '291683', '291776', '291777', '291791', '291817', '337726', '337751', '337766', '337778', '337791', '337794', '337797', '337800', '337812', '337816', '337849', '337900', '337902', '337908', '337969', '338196', '338202']
nosy_count = 11.0
nosy_names = ['tim.peters', 'rhettinger', 'terry.reedy', 'vstinner', 'r.david.murray', 'methane', 'Mark.Shannon', 'serhiy.storchaka', 'josh.r', 'xiang.zhang', 'louielu']
pr_nums = ['1080', '12307', '12308', '12324', '16847']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue30040'
versions = ['Python 3.8']