Have you heard of the Salsa project? Salsa is a library for incremental computation – it’s used by rust-analyzer, for example, to stay responsive as you type into your IDE (we have also discussed using it in rustc, though more work is needed there). We are in the midst of a big push right now to develop and release Salsa 2022, a major new revision to the API that will make Salsa far more natural to use. I’m writing this blog post both to advertise that ongoing work and to put out a call...