rustd builds on Rust Analyzer's incrementality for near-instant recompiles after edits

charliermarsh · x · 2026-10-21

Charlie Marsh explains why rustd is built on Rust Analyzer: RA is already architected around incrementality (HIR, with MIR for some features), so in theory you get very fast recompilations after each edit. This is a follow-up to his breakdown of rustd's internals.

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