The inline cache for `LOAD_ATTR` is too large.
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3.12
interpreter-core
performance
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- Python
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Description
The inline cache for LOAD_METHOD takes 10 code units, which is considerably larger than other inline caches, and is an obstacle to merging LOAD_ATTR and LOAD_METHOD (https://github.com/python/cpython/pull/93430), as LOAD_ATTR is such a common instruction.
See https://github.com/faster-cpython/ideas/discussions/396 for some ideas on how to shrink the inline cache.
Linked PRs
- gh-103014
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the LOAD_ATTR and LOAD_METHOD inline-cache discussion in faster-cpython/ideas#396, then review the linked work in gh-103014. The goal is to shrink the LOAD_METHOD cache and remove the obstacle to merging LOAD_ATTR and LOAD_METHOD.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- compilers
- Issue type
- Refactor
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100