ADR-0204 close: refutation record + retrospective + v2.2.1 version bump#146
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….2.1 - Lesson 2026-07-16-outlining-once-called-handlers-size-neutral: fn-ptr table stage A left emit.compile at 707 KB and grew the binary +28.8 KB (reverted) — a giant symbol from once-called inlined handlers is aggregation, not duplication; out-lining is size-neutral. Predictive question = "how many call sites share this code?", not symbol size. - debt: D-521 DISCHARGED (size premise measured-refuted); D-522 reworded to its stage-2 residual (demand-driven, ~200 KB). - ADR-0204: Status -> Implemented; D2 amended with the refutation. - handover: campaign section closed. - CHANGELOG + build.zig.zon: v2.2.1 (D-522 stage 1 = CLI -21% ReleaseSafe, no API/behaviour/JIT-output change).
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July 16, 2026 04:14
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Summary
Closes the binary-size campaign (ADR-0204; kickoff #144, stage 1 #145). Docs + ledger + version bump only — no src/ change.
2026-07-16-outlining-once-called-handlers-size-neutral.md: the D-521 fn-pointer-table probe leftemit.compileat 707 KB and grew the binary +28.8 KB (reverted). A giant symbol made of once-called inlined handlers is aggregation, not duplication — out-lining is size-neutral. The predictive question is "how many call sites share this code?", not symbol size (contrast D-522's ×64-duplicated thunks: −1.08 MB).Tag
v2.2.1follows after this merges (user-granted in-session per ADR-0156).