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M5.6a: memory report (library.memory, ui.inspect memory) and opt-in DHAT heap profile

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Per-cache bytes: decoded thumbnail/preview/full sources, rendered previews,
GPU device buffers (allocated/pooled/retired), loupe stage caches (CPU and
GPU) and textures. lightcraft-cli --features dhat-heap adds live/peak heap and
writes dhat-heap.json.

Baseline (14 raws, loupe, 12 steps): peak RSS 1.9-2.3 GB, footprint 2.5-2.6 GB;
heap peak 634 MB after import (probes decode every raw), 930 MB during grid
thumbnails (parallel decodes); GPU free pool grows to 2 GB (exact-size reuse).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Brandon Thomas
2026-10-01 10:28:13 -04:00
co-authored by Claude Opus 5.5
parent c2a09ed8e9
commit 78e50b5fc5
18 changed files with 486 additions and 17 deletions
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apps/lightcraft-cli/src/main.rs
+15
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@@ -51,7 +51,22 @@ USAGE:
lightcraft-cli --version | --help
";
#[cfg(feature = "dhat-heap")]
#[global_allocator]
static ALLOC: dhat::Alloc = dhat::Alloc;
fn main() -> ExitCode {
// `--features dhat-heap`: count allocations; the profile is written when `_heap` drops
// (LIGHTCRAFT_DHAT_FILE, default dhat-heap.json).
#[cfg(feature = "dhat-heap")]
let _heap = {
let file = std::env::var("LIGHTCRAFT_DHAT_FILE").unwrap_or_else(|_| "dhat-heap.json".into());
lightcraft_engine::memory::set_heap_stats(|| {
let s = dhat::HeapStats::get();
lightcraft_engine::memory::HeapUsage { current: s.curr_bytes as u64, peak: s.max_bytes as u64 }
});
dhat::Profiler::builder().file_name(file).build()
};
let args: Vec<String> = std::env::args().skip(1).collect();
let r = match args.first().map(String::as_str) {
Some("mcp") => mcp(&args[1..]),