hsivonen / hsivonen/encoding_rs
Experiment with prefetch hints
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- Dominant language
- Rust
- Stars
- 464
- Forks
- 70
- Avg merge
- 2d 4h
- Merged PRs (30d)
- 2
Description
simdutf8 appears to get value out of cache prefix hints. Experiment with using cache prefix hints in this crate.
The portable ones https://doc.rust-lang.org/std/hint/fn.prefetch_read.html and https://doc.rust-lang.org/std/hint/fn.prefetch_write.html are nightly-only, but so is core::simd.
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 comparing simdutf8’s cache prefix hint approach with encoding_rs’s relevant hot paths. Read Rust’s prefetch_read and prefetch_write documentation, noting that both are nightly-only like core::simd. Done means the crate has a measured experiment showing whether these hints provide value.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- performance
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100