Claude
aba89c4f5d
Every change is benchmark-verified (harness + before/after numbers in benches/, measured on this branch; reproduction commands in each doc): DAV / sync-client hot paths - PROPFIND dead-properties: one = ANY($1) query per 500-child page instead of one sequential query per child, and indexable `=` predicates instead of IS NOT DISTINCT FROM (seq scans). 2,000-child folder: 1.07-4.54 s of DB chatter -> 4-6 ms (258-773x). Applied to native + NC PROPFIND and both NC REPORT handlers. [benches/DEAD-PROPS.md] - Folder paging: keyset cursor (name > $last) + new partial index (folder_id, name) replaces LIMIT/OFFSET full-folder rescan per page. Full 20k-file walk: 1266 ms -> 77 ms (16.5x). New migration 20260917000000. [benches/PROPFIND-PAGING.md] - NC chroot / default-drive resolution: moka caches (30 s TTL, explicit invalidation on drive mutations) for find_default_for_user and the markerless chroot FolderDto. 2 uncached queries + 2 pool checkouts per NC/WebDAV/WOPI request -> sub-us moka hit (p50 0.7-3.6 ms -> ~1 us). [benches/CHROOT-CACHE.md] - Quota: PROPFINDs whose prop list never names a quota prop skip the 2-query resolution entirely (wants_quota()); the remaining lookups read 2 columns instead of the full auth.users row with its <=512 KiB avatar (11-16x, p50 3.4 ms -> 0.29 ms). Same narrow read now gates every upload quota check. [benches/QUOTA-PATH.md] CPU on the request path - ZIP exports (folder download, share ZIP, batch download): entries whose MIME says already-compressed (JPEG/MP4/zip/pdf/...) are Stored instead of Deflate - deflate ran inline on the tokio writer task at ~41 MB/s for ~0% size gain. Mixed media corpus: 4.31x wall and CPU, archive size unchanged. Shared predicate in common::mime_detect. [benches/ZIP-MEDIA.md] - Compression layers: tower-http's default maps to Brotli QUALITY 11 (verified in brotli-8.0.2 source and empirically: 90 ms per 64 KiB JSON response, 1.3 s per 700 KiB bundle). Both layers pinned to Precise(4): 99x less CPU for ~15% more bytes. SPA assets are now precompressed at build time (scripts/precompress.mjs, 77% smaller) and served via ServeDir::precompressed_br/gzip: 2016x less per-request work, and clients get the better q11 bytes. [benches/STATIC-PRECOMPRESSED.md] Batched / cached backend paths [benches/NPLUS1-AND-CACHES.md] - Content-search ReBAC re-verification: new AuthorizationEngine::check_files_read_batch (default = old loop; PgAclEngine override batches drive resolution + reuses role cache). 200 sequential point SELECTs per search -> 1-2 queries. - Batch-ZIP subtree downloads: drop per-file re-authz + per-file Recent recording (2 writes/file) for subtree entries already authorized at the root - mirrors the native folder-download path. ~6,000 statements removed from a 2,000-file archive. - CDC chunk manifests: immutable by content address, now moka-cached (weight-bounded 32 MiB, 60 s TTL, positive-only, invalidated on delete) - removes one manifest query (p50 0.44-4.4 ms) from every stream, range and full blob read. - People tab: grouped COUNT + batched cover lookup instead of dragging every face row with its 2 KiB embedding (10k faces: 30.4 ms & 21 MB -> 3.8 ms & 1.3 KB, 8.1x); merge() is one set-based UPDATE. [benches/PEOPLE-LIST.md] - Photos timeline cursor: raw timestamptz comparison instead of EXTRACT(EPOCH ...) wrapper + IS NULL OR disjunction - cursor is an index boundary again, deep scroll stops re-scanning skipped rows. - Public share landing: one atomic UPDATE ... access_count + 1 (was SELECT + full-row write-back: racy, lost updates, clobbered concurrent owner edits) - 3 round-trips -> 2 per visit. - move_to_trash: dead full-entity SELECT feeding a documented no-op removed from both branches; dead fields dropped from TrashService. - NFC normalization: is_nfc_quick fast path skips the decompose/recompose state machine for the ~100% already-NFC case (every row loaded from PG). Frontend - Large folders paint after page one (~200 items) via fetchFolderListing's new onPage hook instead of waiting for every sequential page. - Tested-and-reverted (kept for the record): cached Intl.Collator for name sorts - vitest showed it 2x SLOWER than V8's argument-less localeCompare fast path (5.6 ms vs 12.1 ms / 5k names). Sort order untouched. New bench harnesses under examples/ (bench feature): zip_media, dead_props, chroot_cache, quota_path, people_list, propfind_paging, static_precompress. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CBK1RdtzyP6759Muqe1K1w
46 lines
2.2 KiB
Markdown
46 lines
2.2 KiB
Markdown
# NC chroot / default-drive resolution — moka caches (vs 2 queries/request)
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With app-password verification already cached (5 min) and user flags cached
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(30 s), the NextCloud basic-auth middleware still resolved the chroot from
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scratch on EVERY protected NC request: `find_default_for_user` (drives JOIN
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folders) + `get_folder(root_id)` (folders by PK) — 2 uncached round-trips + 2
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pool checkouts before the handler even ran, for values that change only on
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provisioning / drive deletion / a root-folder rename. The native `/webdav`
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surface repeated the drive lookup per request (Mode-B scope resolution, MOVE
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and COPY twice), WOPI once per call.
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Changes:
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1. `DrivePgRepository::find_default_for_user` memoised (moka, 30 s TTL —
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same tier as `drive_role_cache`), invalidated on personal-drive creation,
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drive deletion and policy updates. Only `Ok` is cached, so the
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provisioning idempotency check still sees the live table.
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2. NC middleware markerless-chroot `FolderDto` cached by root-folder id
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(30 s TTL). Only the markerless branch — the drive-marker branch keeps
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its per-request `get_folder_with_perms` authz.
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Staleness: bounded at 30 s for a root-folder *rename* (doesn't pass through
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the repo); every other mutation invalidates explicitly.
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## Reproduce
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```bash
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cargo run --release --features bench --example bench_chroot_cache
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# tunables: BENCH_POOL=20 BENCH_SECONDS=4 BENCH_CONCURRENCIES=8,64
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```
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## Results (4 cores, local PG16, pool=20)
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| conc | mode | req/s | p50 µs | p95 µs | p99 µs | queries |
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|-----:|--------|----------:|--------:|--------:|--------:|--------:|
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| 8 | BEFORE | 11,013 | 696.8 | 1,203.2 | 1,642.6 | 88,102 |
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| 8 | AFTER | 2,011,191 | 0.69 | 1.97 | 8.47 | 0 |
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| 64 | BEFORE | 16,952 | 3,633.3 | 5,617.6 | 7,189.1 | 135,618 |
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| 64 | AFTER | 2,337,233 | 0.93 | 2.23 | 11.30 | 0 |
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- The fixed per-request DB tax of the whole NC surface (sync PROPFIND storms,
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per-chunk uploads, previews, OCS polls) drops from **0.7–3.6 ms p50 (and 2
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pool checkouts)** to a **sub-µs moka hit**.
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- Under sync-storm concurrency (64 in-flight) the BEFORE p99 was 7.2 ms of
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pure chroot overhead per request — that whole term vanishes.
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