An Incrementally Spicier rust-analyzer
summary
rust-analyzer migrates to a new Salsa backend and reports concrete wins and pains: a tricky self-referential interning problem and an initial 5x memory usage regression that peaked near 10 GB then falls to ~2.3 GB after fixes. Incremental operations become far faster — adding a dependency drops from about 30 seconds to 300 milliseconds — and the engine gains fixed‑point iteration, planned persistent caches, GC for interned values, and prospects for parallel autocomplete and much lower completion latency.
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chapters (12)
- 0:00Rust Analyzer introduction
- 1:10Incremental computation
- 6:12Caching and invalidation
- 9:48What is Salsa and how it helps
- 11:54Salsa in Rust code
- 13:20When you might not need Salsa
- 14:02Core Salsa concepts
- 18:34Salsa benefits for Rust Analyzer
- 20:17New Salsa features
- 25:35Salsa memory management
- 27:22Salsa GC and revisions
- 30:36Q&A
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