* refactor(highway): lift 79 per-instance closure vars into `hwState` (R3c H lift)
Collapses createHighway()'s 79 mutable closure `let`s into one per-instance
`hwState` object. Scope-resolved rewrite via acorn + eslint-scope: 1059 edits
(1057 references + 79 defs - the deleted `let canvas, ctx, ws`), with the four
names shadowed in inner scopes (chartTime/ctx/notes/chordTemplates) resolved
correctly so only closure-bound refs move. Enables the later module split:
extracted renderer/ws modules close over `hwState` as a factory arg, so
multi-panel plugins (highway_3d, note_detect, splitscreen) don't share one
highway's state.
Container is `hwState`, NOT `H` — `H` is already canvas height (70 uses). The
frame-time gate caught that collision instantly (0 draws, `H._drawHooks is not
iterable` in the shared draw-hook path).
PERF (the whole risk): identical to the pre-lift baseline. Draw p50 2.1-2.2 ms,
p95 2.7-3.0 ms (pre-lift 2.7-3.2), measured on the Arcturus feedpak, headless.
Each closure-slot read became a `hwState.<slot>` monomorphic property load; the
hot loop pays nothing. On-device: Byron confirmed the 2D highway plays smoothly.
Tests: the ~30 highway JS suites brace-extract functions/patterns from the
source; their state references + the monotonic-clock vm sandbox now use
`hwState.<slot>` (the const _CHART_MAX_INTERP_MS etc. stay top-level, not
lifted). node --test: 1030/1030 green. Two self-inflicted over-replacements
caught and reverted (`_lefty` is a prefix of the 3D-local `_leftyCached`;
`STRING_COLORS` a suffix of `DEFAULT_STRING_COLORS`) — substring replaces on the
brace-extract regexes need word care.
Transformer saved at ~/.local/share/feedback-editor/highway-h-lift.mjs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(highway): pin the setNoteStateProvider assertion to hwState._noteStateProvider (CodeRabbit)
The [^}]* form matched an unqualified _noteStateProvider =, so a regression to
closure-level state could still pass. Require the hwState-qualified assignment.
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Static-analysis follow-ups to the trace-backed fixes; each is cheap
insurance on machines where the profiled headroom doesn't exist.
- highway.js: _makeBundle now mutates one persistent per-instance
object instead of allocating a fresh ~35-field bundle every rAF
frame (xN under splitscreen). Object identity is stable and
meaningless; array fields still swap reference on chart changes,
which field-identity caches rely on. Contract documented in both
CLAUDE.mds.
- highway.js: new bsearchTime (lower-bound on .time) windows the
default 2D renderer's beat-line scan (was O(all beats) per frame);
bundle.lowerBoundT / bundle.lowerBoundTime expose the searches to
custom viz so they stop reimplementing visible-window culling.
- highway_3d: localStorage 'h3d_full_sus' polled at ~1 Hz instead of
every frame (synchronous storage read on the hot path).
- highway_3d: drawLyrics caches the measureText row layout keyed on
(lyrics ref, line index, shown count, font size, width) — per-frame
work is now just drawing over cached widths.
- tests/js: bundle source-shape assertions widened to accept the
assignment form ([:=]) alongside the old object-literal form.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
