16 lines
947 B
Rust
16 lines
947 B
Rust
//! Project-wide `HashMap` / `HashSet` backed by [aHash] instead of the standard
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//! library's SipHash.
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//!
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//! The router touches maps on every single message — `users` by uid, `nick_index`
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//! and `remote_nick` by nick, `channels` by name, per-channel `members`. SipHash is
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//! deliberately slow (it trades speed for DoS resistance); aHash keeps the
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//! DoS resistance (its state is seeded from process-random data, so an attacker
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//! can't predict bucket placement to force collisions) while hashing these short
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//! keys 2-3x faster. Same std `HashMap<K, V, S>` underneath — every method, the
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//! `entry` API and `Index` all behave exactly as before; only the hasher changes,
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//! so construction moves from `::new()` (SipHash-only) to `::default()`.
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//!
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//! [aHash]: https://docs.rs/ahash
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pub type HashMap<K, V> = std::collections::HashMap<K, V, ahash::RandomState>;
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pub type HashSet<T> = std::collections::HashSet<T, ahash::RandomState>;
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