Benchmark-gated, same rule as ROUND2-21: every change ships with a
BEFORE/AFTER counting-allocator benchmark and a byte/-value equivalence
gate; an AFTER that fails to reduce allocations exits non-zero (rollback).
See benches/ROUND22.md and examples/bench_round22_micro.rs. All arms
no-Postgres.
- H1: the hot GET handlers (get_thumbnail, download_file, list_files_query,
list_photos, NextCloud preview, public-share download/access) take
`req: Request` last and read `req.headers()` by borrow instead of axum's
HeaderMap extractor, whose FromRequestParts impl clones the whole request
header table just to read 1-3 headers (the ROUND14 §A4 middleware pattern,
finally propagated to the handlers). 2 -> 0 allocs/req · 9.95x wall.
- W1: native WebDAV write_etag_quoted — the etag emitter for every /webdav/
PROPFIND row (per file AND per folder, up to 500/page) — emits the quotes
as borrowed pre-escaped " text events instead of escaping a "{etag}"
String (the ROUND20 §C1 / ROUND21 §R4 pattern). 3 -> 0 allocs/row.
- C1: CalDAV getetag routed through a shared write_quoted_etag helper across
all 5 sites (3 per-event + 2 per-calendar); the now-dead etag: &mut String
buffer threaded through write_event_response/standard/requested props + the
two per-page buffers removed. 2 -> 0 allocs/row.
- D1: FileDto::from reuses the moved parts.blob_hash instead of cloning it
via the content_hash() getter (the ROUND19/20 move-not-clone sweep missed
it — hash/etag are read before into_parts()). Per file row of every
listing. 1 -> 0 allocs/row.
- E1: CalendarEvent::update_time_range/update_all_day stamp timed
DTSTART/DTEND via fmt::compact_ical_utc stack render (chrono fallback out
of range) instead of the %Y%m%dT%H%M%SZ strftime interpreter. 4 -> 0.
- S1: ShareItemType::try_from uses eq_ignore_ascii_case instead of a
throwaway to_lowercase() String. 1 -> 0 allocs/parse.
Verified: cargo clippy --features bench --all-targets -D warnings clean,
cargo fmt --all --check clean, cargo test --lib --features bench = 529
passed / 0 failed (incl. the OpenAPI-spec-validity test guarding the H1
utoipa-handler signature change).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DKyQ4AnYtgp1JtjzweyMeo
Claude