rust-lang / rust-lang/rust

Store resolutions for associated type constraints instead of recomputing them

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A-resolve C-optimization T-compiler
Dominant language
Rust
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Forks
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Description

An improvement for the resolver suggested by @petrochenkov here.

Contributor guide

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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 with the resolver implementation and the discussion in PR #143519, especially the linked comment. Determine where associated type constraints are currently resolved and recomputed; done means storing those resolutions and avoiding the repeated computation, with appropriate compiler tests identified during the investigation.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Refactor
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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