dtourolleandClaude Opus 5
6d6ef8d34b
Scrolling jittered, and this was the largest single reason. Every window the grid loads is `ORDER BY ... LIMIT n OFFSET k`, and neither half of that was being answered the cheap way. **The sort.** `GRID_ORDER` leads with `captured_at IS NULL`, so undated frames fall to the end. No ordinary index answers that — the leading term is an expression, not a column — so SQLite sorted the whole library into a temp b-tree on every window read, then threw away the first `k` rows of it. Schema V7 indexes the expression exactly as the query writes it, partial on the same `shadowed_by IS NULL AND trashed_at IS NULL` the grid filters by, so the read becomes a walk along the index. **The join.** `LEFT JOIN remote` was paged *after* it was joined, so reading 280 cells at offset 20,000 first seeked into `remote` for all 24,000 rows and then discarded 23,720 of them. The file ids are now fetched for the 280 rows that survived — the shape the badge and rating reads already use, one query for the window rather than one per cell. Measured together on 24,000 images at offset 20,000: **15.2 ms → 0.36 ms**, inside a scroll handler that has 16.7 ms to draw a frame. The test asserts on the query plan rather than on a duration, because there is no other symptom. A `GRID_ORDER` edited out of step with the index, or a column added back that drags `remote` in again, both still return exactly the right cells — just after sorting the library — and the jitter would come back with nothing to point at. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
DarkRoom
A cross-platform, non-destructive RAW photo editor for Linux and Android.
Status: early. v0.1 is a remote library viewer — see docs/milestone-v0.1.md.
Documentation
| Document | Contents |
|---|---|
| requirements.md | What the software must do — 122 numbered requirements |
| architecture.md | How it is built — crates, GPU pipeline, data model, sync |
| milestone-v0.1.md | The first buildable milestone |
Building
Desktop:
cargo run -p darkroom-desktop
Android (containerised toolchain, see docker/android):
./docker/android/build.sh cargo ndk -t arm64-v8a build --release
Current state
Working: workspace, GPU context and compute pass, adaptive Slint shell, Android cross-compilation of the core crates.
Not yet working: the zero-copy display path. The build currently uploads frames through the CPU, which is exactly what ARCH §6.1 forbids — measured at 96% of frame time at 4K. Replacing it is spike S1, the project's highest priority.
cargo run -p dr-gpu --example bench --features readback
reproduces that measurement.
Licence
GPL-3.0-or-later.