test

databendlabs · Apr 28, 2022 · 808f386 · 808f386
1 parent bf151db
commit 808f386
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/query/src/common/hashtable/two_level_hash_table.rs b/query/src/common/hashtable/two_level_hash_table.rs
@@ -36,7 +36,7 @@ pub struct TwoLevelHashTable<Key: HashTableKeyable, Entity: HashTableEntity<Key>
 
 impl <Key: HashTableKeyable, Entity: HashTableEntity<Key>> TwoLevelHashTable<Key, Entity> {
     pub fn create() -> TwoLevelHashTable<Key, Entity> {
-        let mut hash_tables: Vec::<HashTable<Key, Entity>> = Vec::new();
+        let mut hash_tables: Vec::<HashTable<Key, Entity>> = Vec::with_capacity(NUM_BUCKETS);
 
         for index in 0..NUM_BUCKETS {
             hash_tables.push(HashTable::<Key, Entity>::create());
@@ -61,7 +61,7 @@ impl <Key: HashTableKeyable, Entity: HashTableEntity<Key>> TwoLevelHashTable<Key
 
     #[inline(always)]
     pub fn iter(&self) -> TwoLevelHashTableIter<Key, Entity> {
-        let mut iters = Vec::new();
+        let mut iters = Vec::with_capacity(NUM_BUCKETS);
         for i in 0..NUM_BUCKETS {
             iters.push(self.hash_tables[i].iter())
         }