Different codegen between comparison of `&str` and `&[u8]` on `And` and `Or` condition
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C-optimization
T-compiler
- Dominant language
- Rust
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- 119k
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Description
On And condition, &[u8] can be optimized directly as false while &str can't
https://godbolt.org/z/GvWxGxj5b
On Or condition, &[u8] generates more branches/comparisons than &str
https://godbolt.org/z/EcYa99658
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 reproducing the two Rust examples using the linked Godbolt cases for And and Or conditions, then compare the generated code for &str and &[u8]. The issue names no repository files or tests; done means determining the intended codegen behavior and aligning the differing cases with regression coverage.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100