Add fast_cache2.rs

src/cache/owned_cache/fast_cache2.rs

@@ -0,0 +1,20 @@
+use core::{any::Any, cell::RefMut, hash::BuildHasherDefault};
+use crate::{LockedMap, NoHasher, State, UniqueId};
+
+use super::Cache2;
+
+#[derive(Default)]
+pub struct FastCache2 {
+    pub nodes: LockedMap<UniqueId, Box<dyn Any>, BuildHasherDefault<NoHasher>>,
+}
+
+impl Cache2<Box<dyn Any>> for FastCache2 {
+    #[inline]
+    fn get_mut(&self, id: UniqueId, _len: usize) -> State<RefMut<Box<dyn Any>>> {
+        self.nodes.get_mut(&id)
+    }
+
+    fn insert(&self, id: UniqueId, _len: usize, data: Box<dyn Any>) {
+        self.nodes.insert(id, data);
+    }
+}