Tier Two Optimizer Eliminate Function Version Guards
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- Dominant language
- Python
- Stars
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Description
Feature or enhancement
Proposal:
Suggested by @brandtbucher at the PyCon sprints
The tier two interpreter currently adds additional function function guards when it doesn't need to. We can use the function watcher to track when the function version changes and only add the first one.
Similar to the issue for type version guards https://github.com/python/cpython/issues/119258 and the implemented solution https://github.com/python/cpython/pull/119365
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Linked PRs
- gh-119491
- gh-119510
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 reviewing the related type-version-guard issue 119258, its implemented PR 119365, and the linked PRs 119491 and 119510. The intended result is for the tier two interpreter to use the function watcher so it adds only the first function version guard instead of redundant guards.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- compilers, performance
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100