* perf: reuse large buffers so a pinned glibc trim threshold costs no speed (#10479)
With MALLOC_TRIM_THRESHOLD_ set (#8743), glibc maps every allocation over
128 KiB fresh, so tiles, compositor bands and filter scratch were page-faulted
in on every call: viewport compose 3.6x slower, Gaussian Blur up to 1.8x,
.pcraft save 2.4x.
- photocraft_raster::scratch: a process-wide, capped pool of large Vec
buffers (u8/u16/f32/[f32; 4]). A miss drops the oldest buffers worth its
size down to a 256 MiB floor, so peak memory stays near glibc's defaults.
The engine releases the pool after any command that closes a document,
Headless::close does too, and an idle thread releases it after 2 s unused.
- Tiles, compose Buffer/masks/bands, algo Image and the blur paths, engine
adjustment/filter scratch, GPU tile upload and io import buffers go through
the pool.
- .pcraft save reuses one zstd FrameCompressor per worker (byte-identical).
- interactive_bench reports minor page faults per run.
36 MP, trim threshold set vs glibc defaults: viewport 5.6 vs 6.1 ms (was
22.7), Blur r4 445 vs 437 ms (was 852), Curves CPU proxy 35.0 vs 35.7 ms
(was 50), flatten 146 vs 147 ms (was 237), save .pcraft 251 vs 230 ms (was
545). RSS after closing a 5400x7200 document: 21 MB with trim set.
* fix: corpus tests build again; return remaining pooled buffers (#10479 review)
- Corpus-gated io tests and the Photoshop-oracle test moved `.px` out of a
`Buffer`, which now implements `Drop` (E0509 with `--features corpus`):
use `into_px()`.
- io: masks, the merged image, extra channels, smart-filter masks,
smart-object pixels and patterns give their `interleave` buffers back to
the scratch pool after writing them.
- compose: recycle the mask values of a pass-through group, `effect_shape`
and both `split_parts` callers.
- Styled Free Transform preview copies each band out instead of moving it,
so the band returns to the pool.
- interactive_bench: the fault count covers each whole run, untimed setup
included; say so.
* fix: recycle the masks of adjustment-atop and shape layers (#10479 review)
* fix: recycle effect hiding masks (#10479 review)
* fix: recycle knockout, CMYK and GPU shape masks; release the pool when Split/Merge Channels close a document (#10479 review)
* fix: release the pool when a closed document's cancelled workers exit; idle-release switch for tests; don't pool PSD planes (#10479 review)
* fix: release the pool for workers cancelled before their document closes; take the pool lock for budget and idle-release changes (#10479 review)
* fix: idle release rechecks activity under the lock; try_take_exact releases the pool and retries before failing (#10479 review)
* test: cover a successful try_take_exact miss; name the failed-reservation test for what it checks (#10479 review)
* fix: pool the final GPU effect shape buffer and return it after use (#10479 review)
* docs: describe scratch pool lifecycle regression invariants
* test: verify polling releases cancelled document scratch buffers
* perf: recycle remaining transform selection and PSD scratch buffers
* fix: free PSD gather bands before allocating channel planes
* test: assert exact scratch take reuses pooled storage
Loading the Intel Vulkan driver on Windows (igvk64.dll) crashes the process
with STATUS_ACCESS_VIOLATION (#4). The app leaves Vulkan out on Intel, but
the tests use wgpu's defaults, so on such a machine `cargo test` dies in the
first GPU test (ui-egui's background_redraw, adjust_preview_gpu, ...).
WGPU_BACKEND=dx12 avoids it for the kittest harnesses, but seven tests and
four benches built their instance with wgpu::Instance::default(), which takes
every backend and ignores the environment. They now use
InstanceDescriptor::new_without_display_handle_from_env(): the same defaults
with WGPU_BACKEND and friends applied, so nothing changes where it is unset.
Document the workaround in docs/development.md and the testkit driver notes.
swept_blocks_match_the_pixel_search skips the cases where the colour mode reaches extrude only
through a channel count and ink setting an earlier mode already covered. It and
damaged_layer_data_opens_flattened run a quarter of their cases per run, a different quarter each
UTC day (photocraft-testkit's Sweep). PHOTOCRAFT_FULL_SWEEP=1 runs every case, and
PHOTOCRAFT_SWEEP_PART=<n> replays the part a failing run printed.
On Windows, GPU UI test binaries crashed with STATUS_ACCESS_VIOLATION
whenever two of their tests ran at once: arbitrary_rotation_preview 3
runs in 4 on main, and color_managed_canvas, crop_default_mode,
drag_preview_canvas and full_res_preview at random. egui_kittest
prefers a CPU adapter, which on Windows is WARP over DX12, and a dump
puts the fault inside d3d10warp.dll with two WARP devices rendering on
parallel test threads. Bare egui harnesses with no PhotoCraft code
crash the same way, and Vulkan or GL never does. CI's Windows runners
have no GPU, so they run on WARP too.
Three binaries already held a per-binary lock for the same class of
driver bug (Mesa llvmpipe and RADV, #194; libvulkan with NVIDIA and
lavapipe). That lock now lives once in photocraft-testkit
(`gpu_lock`, with the reasons) and every test in the twelve GPU test
binaries without it takes it on its first line. Under nextest each
test is its own process and the lock is free.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Khawar Zamman Wani
FredApps
Kushagra Sharma
aiongg
Dan HiornsandClaude Opus 5.5
Brandon Thomas