docs(audits): retained checksum pipeline already double-buffered#4033
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oferchen merged 1 commit intoMay 14, 2026
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…e-buffered Task #1759 asked for double-buffering in the retained checksum pipeline. The work is already done in `crates/checksums/src/pipelined/`: the reader pre-allocates two buffers, seeds one into a recycle channel, and uses a bounded `sync_channel(1)` so the I/O thread reads block N+1 while the caller hashes block N. Functional parity with the serialized hasher is covered by unit and proptest cases. This audit documents where the implementation lives, the two-buffer invariant, the sync fallback, and the existing test coverage so future contributors do not reintroduce a parallel primitive.
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…e-buffered (#4033) Task #1759 asked for double-buffering in the retained checksum pipeline. The work is already done in `crates/checksums/src/pipelined/`: the reader pre-allocates two buffers, seeds one into a recycle channel, and uses a bounded `sync_channel(1)` so the I/O thread reads block N+1 while the caller hashes block N. Functional parity with the serialized hasher is covered by unit and proptest cases. This audit documents where the implementation lives, the two-buffer invariant, the sync fallback, and the existing test coverage so future contributors do not reintroduce a parallel primitive.
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Summary
crates/checksums/src/pipelined/.sync_channel(1)keeps in-flight data to one block.signature::pipelined_gen, benches, comprehensive tests), and the existing functional-parity coverage so future contributors extend the primitive instead of duplicating it.Test plan
cargo fmt --all(no-op, no Rust files modified).