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perf(slirp): handle_tcp_frame followups — extract SYN, FxHash, cold paths #80

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Merged
dpsoft merged 4 commits into from
May 6, 2026
Merged

perf(slirp): handle_tcp_frame followups — extract SYN, FxHash, cold paths #80

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7283cc2
refactor(slirp): extract handle_tcp_syn_outbound from handle_tcp_frame
dpsoft May 6, 2026
6647238
perf(slirp): switch flow_table + token_to_key to FxHash
dpsoft May 6, 2026
c77c911
perf(slirp): mark cold paths in handle_tcp_frame
dpsoft May 6, 2026
83fdf01
perf(slirp): #[inline(never)] on handle_tcp_frame for profiler attrib…
dpsoft May 6, 2026
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1 change: 1 addition & 0 deletions Cargo.lock
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6 changes: 6 additions & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,12 @@ ipnet = "2"
# (Type::STREAM.nonblocking() needs the "all" feature flag)
socket2 = { version = "0.5", features = ["all"] }

# Non-cryptographic hasher for the SLIRP flow table. The default std
# HashMap uses SipHash for DoS resistance, which is the right default
# for attacker-influenced keys but unnecessary overhead on the data
# path of a NAT keyed by guest-side ports the guest itself chooses.
rustc-hash = "2"

# --- macOS-only dependencies ---
[target.'cfg(target_os = "macos")'.dependencies]
# Objective-C 2.0 bindings (auto-generated from Apple frameworks)
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