use ahash for mapping blockhash q (#3789)

Author: bw-solana

accounts-db/src/blockhash_queue.rs

@@ -26,7 +26,7 @@ impl HashInfo {
 #[cfg_attr(
     feature = "frozen-abi",
     derive(AbiExample),
-    frozen_abi(digest = "2GFWjonjAdte2KsJthPzFdSvVKJ4viKYTPzUHB8dzjtE")
+    frozen_abi(digest = "DZVVXt4saSgH1CWGrzBcX2sq5yswCuRqGx1Y1ZehtWT6")
 )]
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct BlockhashQueue {
@@ -36,7 +36,7 @@ pub struct BlockhashQueue {
     /// last hash to be registered
     last_hash: Option<Hash>,
 
-    hashes: HashMap<Hash, HashInfo>,
+    hashes: HashMap<Hash, HashInfo, ahash::RandomState>,
 
     /// hashes older than `max_age` will be dropped from the queue
     max_age: usize,
@@ -51,7 +51,7 @@ impl Default for BlockhashQueue {
 impl BlockhashQueue {
     pub fn new(max_age: usize) -> Self {
         Self {
-            hashes: HashMap::new(),
+            hashes: HashMap::default(),
             last_hash_index: 0,
             last_hash: None,
             max_age,

runtime/src/bank/serde_snapshot.rs

@@ -570,7 +570,7 @@ mod tests {
         #[cfg_attr(
             feature = "frozen-abi",
             derive(AbiExample),
-            frozen_abi(digest = "DVmmgXfBgsFRjX2Yun7Wcyt2gafnMVHvTRXBVUHeL3NC")
+            frozen_abi(digest = "9THbM4acSoJYENSTHp1qBdXyvPr3qUQTSTkotUNkFc76")
         )]
         #[derive(Serialize)]
         pub struct BankAbiTestWrapper {