Brandon ThomasandClaude Opus 5.5 ec6637f238 M5.4b: faster raw path — bin previews/thumbnails straight from the mosaic ...

- lightcraft-raw: RawImage::develop_binned(k) — k×k superpixel binning of the CFA
  (Bayer k even, X-Trans k multiple of 3), black/white normalised row by row, default
  crop only, clipping preserved for highlight reconstruction. 2560 px previews of a
  24 MP raw bin 2×, thumbnails 4–8×; exports / 1:1 still demosaic (AHD) at full size.
- highlight::reconstruct and its pyramid fill are rayon-parallel (bit-exact).
- X-Trans directional demosaic: precomputed per-phase neighbour offsets and no
  reflection in the interior, no per-pixel allocation (bit-exact, tested against the
  reference formulation): 2.9 s → 0.75 s CPU at 24 MP.
- files::load_bytes runs on a rayon worker so its short parallel loops don't each
  wait for the pool to wake (dominant cost on a loaded machine); LIGHTCRAFT_PROFILE
  prints per-stage source timings; files::bin_factor picks the block size.
- render_bench ONLY=source: per-file decode / normalise / demosaic / binning / load.
- Fix: u64 overflow on hostile IFD sizes in DNG/ARW/NEF raw-IFD selection (proptest).

load_bytes(2560) CPU time, ARW a7 III 24 MP: 2347 → 240 ms; X-T20: 3120 → 1220 ms.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-01 09:01:53 -04:00

..

render_bench.rs

M5.4b: faster raw path — bin previews/thumbnails straight from the mosaic

2026-10-01 09:01:53 -04:00