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docs: README — instant culling numbers 

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Brandon Thomas 2026-10-01 09:44:39 -04:00
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@ -206,6 +206,9 @@ lightcraft --control 7980 ~/Pictures/trip
checked against the CPU pipeline to within 1/255. On a 24 MP raw (Apple M4 Pro): a slider update re-renders in
~4 ms, a cold 2.5 MP loupe in ~30 ms, and a full-size export in ~0.3 s including a parallel JPEG encode.
Without a GPU the same pipeline runs on all CPU cores, redoing only the stages a slider affects.
- **Instant culling.** Opening a raw shows its embedded camera preview or cached render within ~0.1 s while the
full render follows (~0.2–0.5 s for 24 MP); the next and previous photos are prepared in the background, so stepping
through a shoot takes ~50 ms per photo.
- **Background rendering.** A worker pool renders the loupe, before/after and every visible thumbnail off the UI
thread; drafts during drags, full quality on release.
- **Local-first.** No account, no cloud, no telemetry, no subscription. Your catalog is an append-only log of