# Build performance (https://jackin.tailrocks.com/research/engineering/build-performance/)



This dossier keeps measured cache behavior, filesystem constraints, and tool comparisons out of implementation tracking. The Roadmap holds the concise [Rust build-cache hygiene](/roadmap/rust-build-cache-hygiene/) and [shared CI compiler cache](/roadmap/shared-ci-compiler-cache/) outcomes.

| Study                                                                                         | Question                                                                                         | Roadmap outcome                                                |
| --------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------ | -------------------------------------------------------------- |
| [Rust build-cache hygiene](/research/engineering/build-performance/rust-build-cache-hygiene/) | How should jackin❯ own, bound, deduplicate, expose, and clean Rust build storage?                | [Rust build-cache hygiene](/roadmap/rust-build-cache-hygiene/) |
| [Shared CI compiler cache](/research/engineering/build-performance/shared-ci-compiler-cache/) | Which backend and topology can provide bounded cross-runner reuse without weakening correctness? | [Shared CI compiler cache](/roadmap/shared-ci-compiler-cache/) |