trentm / trentm/python-markdown2

Bad performance in _unescape_special_chars

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#635 2 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Python
Stars
2.8k
Forks
459
Avg merge
2d 19h
Merged PRs (30d)
4

Description

Describe the bug
https://github.com/trentm/python-markdown2/blob/adf4e8199ec08ee2ade22eb80703cfb44decbbce/lib/markdown2.py#L2225

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To Reproduce
Pretty hard as its a big markdown file

Expected behavior
A clear and concise description of what you expected to happen.

Debug info
Version of library being used:

Any extras being used:

Additional context
Add any other context about the problem here.

Contributor guide

No contributing guide indexed for this repository

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

Start at lib/markdown2.py around line 2225 and profile _unescape_special_chars with a large Markdown file, as the issue says reproduction is difficult. Identify the slow path and confirm that the change improves processing time without altering unescaping behavior; the issue provides no specific test file.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend, performance
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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