docs(audits): Windows IOCP benchmark plan vs std::fs::File#3814
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Adds a focused plan for benchmarking the IOCP file I/O path (crates/fast_io/src/iocp/, #1717-#1721) against synchronous std::fs::File writes. Covers small (4K-64K) and large (1M-100M) file workloads with 1/4/16/64 concurrent streams, cross-references matched io_uring workloads (#1868), specifies the windows-latest runner with --features iocp via xtask windows-bench, and defines seven decision criteria gating the flip of IocpPolicy::Auto to IOCP-as-default. Refs: #1899, #1868, #1717-#1721
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May 18, 2026
Adds a focused plan for benchmarking the IOCP file I/O path (crates/fast_io/src/iocp/, #1717-#1721) against synchronous std::fs::File writes. Covers small (4K-64K) and large (1M-100M) file workloads with 1/4/16/64 concurrent streams, cross-references matched io_uring workloads (#1868), specifies the windows-latest runner with --features iocp via xtask windows-bench, and defines seven decision criteria gating the flip of IocpPolicy::Auto to IOCP-as-default. Refs: #1899, #1868, #1717-#1721
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Summary
docs/audits/windows-iocp-benchmark-plan.md, a focused plan for benchmarking the Windows IOCP file I/O path (crates/fast_io/src/iocp/, Fix Clippy warnings in transport and walk tests #1717-Add filter program internal tests #1721) against synchronousstd::fs::Filewrites within the sameoc-rsyncbinary.iocp_speedupvsio_uring_speedup) and a 25 percent divergence flag.windows-latestwith--features iocpvia a newxtask windows-benchsubcommand and a.github/workflows/benchmark-windows-iocp.ymlworkflow (smoke on PRs touching IOCP code, full weekly).IocpPolicy::Autoto IOCP-as-default on Windows.Test plan
docs/audits/windows-iocp-benchmark.md,docs/audits/disk-commit-iouring-batching.md,docs/audits/io-uring-fixed-buffer-audit.md.