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Use FxHasher in resolver (#3641)

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## Summary

We can use `FxHasher` in a few more places for string and version keys.
This gives a consistent ~2% improvement to warm resolves.
This commit is contained in:
Ibraheem Ahmed 2024-05-17 15:04:22 -04:00 • committed by GitHub
parent 39af09f09b
commit 0f67a6ceea
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5 changed files with 51 additions and 30 deletions
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12
crates/once-map/src/lib.rs
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@ -1,5 +1,5 @@
use std::borrow::Borrow;
use std::hash::Hash;
use std::hash::{BuildHasher, Hash, RandomState};
use std::sync::Arc;
use dashmap::DashMap;
@ -14,11 +14,11 @@ use tokio::sync::Notify;
///
/// Note that this always clones the value out of the underlying map. Because
/// of this, it's common to wrap the `V` in an `Arc<V>` to make cloning cheap.
pub struct OnceMap<K, V> {
items: DashMap<K, Value<V>>,
pub struct OnceMap<K, V, H = RandomState> {
items: DashMap<K, Value<V>, H>,
}
impl<K: Eq + Hash, V: Clone> OnceMap<K, V> {
impl<K: Eq + Hash, V: Clone, H: BuildHasher + Clone> OnceMap<K, V, H> {
/// Register that you want to start a job.
///
/// If this method returns `true`, you need to start a job and call [`OnceMap::done`] eventually
@ -97,10 +97,10 @@ impl<K: Eq + Hash, V: Clone> OnceMap<K, V> {
}
}
impl<K: Eq + Hash + Clone, V> Default for OnceMap<K, V> {
impl<K: Eq + Hash + Clone, V, H: Default + BuildHasher + Clone> Default for OnceMap<K, V, H> {
fn default() -> Self {
Self {
items: DashMap::new(),
items: DashMap::with_hasher(H::default()),
}
}
}