python / python/cpython

.python_history file causes considerable slowdown

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3.12 build performance
Dominant language
Python
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Description

BPO 41563
Nosy @stevendaprano

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 = None
created_at = <Date 2020-08-16.11:42:32.757>
labels = ['build', '3.8', 'performance']
title = '.python_history file causes considerable slowdown'
updated_at = <Date 2020-08-17.10:33:46.799>
user = 'https://bugs.python.org/bytecookie'

bugs.python.org fields:

activity = <Date 2020-08-17.10:33:46.799>
actor = 'bytecookie'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Build']
creation = <Date 2020-08-16.11:42:32.757>
creator = 'bytecookie'
dependencies = []
files = []
hgrepos = []
issue_num = 41563
keywords = []
message_count = 5.0
messages = ['375505', '375506', '375538', '375539', '375540']
nosy_count = 2.0
nosy_names = ['steven.daprano', 'bytecookie']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue41563'
versions = ['Python 3.8']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names only the .python_history file and BPO 41563; start by reviewing that report and reproducing the reported slowdown. Done means identifying the cause and verifying an improvement, but the payload does not specify a target file or test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
build-system, performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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