salsa-rs/salsa

Health v2 · maintenance only

Adoption not part of the score

2948 stars · 221 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Salsa is a Rust framework for on-demand, incrementalized computation, where programs are defined as memoized queries over inputs. It intelligently reuses cached results when inputs change, based on techniques from rustc's query system.

Use cases

• build an incremental compiler in Rust
• memoize expensive computations that depend on changing inputs
• recompute only what changed when inputs are updated
• implement a query-based analysis pipeline
• build IDE-like tooling with fast reactive updates
• cache derived values in a reactive dataflow graph

When to choose

• you are writing a compiler, linter, or language tooling in Rust that must respond to edits incrementally
• you need fine-grained memoization with automatic invalidation of derived values
• you want a proven design derived from rustc's query system

When to avoid

• your computation is a one-shot batch job with no changing inputs
• you need incremental computation outside Rust
• you want a simple cache without dependency tracking overhead

Facets

library · maturity active

compiler caching concurrency developer-tools compilers developer-tools performance rust cross-platform incremental-computation memoization query-system reactive rust-library

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