perf(engine): cache proof targets in proof sequencer for state root task (#13310)

crates/trie/common/src/proofs.rs

@@ -13,11 +13,29 @@ use alloy_trie::{
     proof::{verify_proof, ProofNodes, ProofVerificationError},
     TrieMask, EMPTY_ROOT_HASH,
 };
+use derive_more::derive::{Deref, DerefMut, From, Into, IntoIterator};
 use itertools::Itertools;
 use reth_primitives_traits::Account;
 
 /// Proof targets map.
-pub type MultiProofTargets = B256HashMap<B256HashSet>;
+#[derive(Debug, Default, Clone, Deref, DerefMut, From, Into, IntoIterator)]
+pub struct MultiProofTargets(B256HashMap<B256HashSet>);
+
+impl MultiProofTargets {
+    /// Extends the proof targets map with another one.
+    pub fn extend(&mut self, other: Self) {
+        for (address, slots) in other.0 {
+            self.0.entry(address).or_default().extend(slots);
+        }
+    }
+
+    /// Extends the proof targets map with another one by reference.
+    pub fn extend_ref(&mut self, other: &Self) {
+        for (address, slots) in &other.0 {
+            self.0.entry(*address).or_default().extend(slots);
+        }
+    }
+}
 
 /// The state multiproof of target accounts and multiproofs of their storage tries.
 /// Multiproof is effectively a state subtrie that only contains the nodes