giles d9e80d8544 CEK frame records: eliminate Hashtbl for all 29 frame types ...

Transpiler detects dict literals with a "type" string field and emits
CekFrame records instead of Dict(Hashtbl). Maps frame-specific fields
to generic record slots:

  cf_type, cf_env, cf_name, cf_body, cf_remaining, cf_f,
  cf_args (also evaled), cf_results (also raw-args),
  cf_extra (ho-type/scheme/indexed/match-val/current-item/...),
  cf_extra2 (emitted/effect-list/first-render)

Runtime get_val handles CekFrame with direct field match — O(1)
field access vs Hashtbl.find.

Bootstrapper: skip stdlib.sx entirely (already OCaml primitives).

Result: 29 CekFrame + 2 CekState = 31 record types, only 8
Hashtbl.create remaining (effect-annotations, empty dicts).

Benchmark (200 divs): 2.94s → 1.71s (1.7x speedup from baseline).
Real pages: ~same as CekState-only (frames are <20% of allocations;
states dominate at 199K/page).

Foundation for JIT: record-based value representation enables
typed compilation — JIT can emit direct field access instead of
hash table lookups.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-19 17:56:50 +00:00

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