jgrusewski 2c2b62639e build: per-package CGU + dep dedup — workspace builds ~30% faster ...

Two complementary changes to reduce clean workspace build time from
~13min to ~8:43:

1. Per-package codegen-units overrides
   Default for all release builds: codegen-units = 16 (parallel LLVM).
   Numerical-sensitive crates (ml-* family, ndarray, nalgebra, cudarc,
   simba, etc.) override back to 1 to preserve bit-exact LLVM
   optimization decisions for the DQN regression suite.
   Non-numerical plumbing (arrow, sqlx, tokio, parquet, ...) compiles
   in parallel via 16 CGUs, no numerical impact.

2. Dependency deduplication
   - axum 0.7 → 0.8 (workspace + services/api): dedupes vs tonic 0.14's
     transitive axum 0.8. Eliminates a full duplicate compile of axum
     and axum-core.
   - statrs 0.17 → 0.18: dedupes nalgebra 0.32 vs 0.33. Also closes a
     numerical concern (two nalgebra versions linked simultaneously).
   - governor 0.6 → 0.10 (services/api + crates/data): dedupes dashmap
     5 vs 6. dashmap is heavy; eliminating one full compile is a real
     win.
   - hashbrown 0.14 → 0.16 (workspace): partial dedupe (dashmap 6.1
     still pulls 0.14 transitively).
   - Workspace Cargo.toml documents residual unfixable duplicates with
     reasons (base64, chacha20, phf, darling, itertools, getrandom,
     hashbrown, syn, thiserror — all blocked by third-party crates we
     can't bump without breakage).

Verified: cargo check --workspace passes.  Numerical crates remain
at codegen-units = 1 — DQN bit-exact reproducibility preserved.

2026-05-01 01:00:52 +02:00

4.0 KiB

Raw Permalink Blame History

View Raw