diff --git a/be/src/exprs/aggregate/aggregate_function_uniq.h b/be/src/exprs/aggregate/aggregate_function_uniq.h
index 4f10bc9f2ceece..7de1732c1ca48c 100644
--- a/be/src/exprs/aggregate/aggregate_function_uniq.h
+++ b/be/src/exprs/aggregate/aggregate_function_uniq.h
@@ -164,13 +164,19 @@ class AggregateFunctionUniq final
             array_of_data_set[i] = &(this->data(places[i] + place_offset).set);
         }
 
+        // Precompute hash values to avoid double computation in prefetch + insert
+        std::vector<size_t> hash_values(batch_size);
+        for (size_t i = 0; i < batch_size; ++i) {
+            hash_values[i] = array_of_data_set[i]->hash(keys[i]);
+        }
+
         for (size_t i = 0; i != batch_size; ++i) {
             if (i + HASH_MAP_PREFETCH_DIST < batch_size) {
-                array_of_data_set[i + HASH_MAP_PREFETCH_DIST]->prefetch(
-                        keys[i + HASH_MAP_PREFETCH_DIST]);
+                array_of_data_set[i + HASH_MAP_PREFETCH_DIST]->prefetch_hash(
+                        hash_values[i + HASH_MAP_PREFETCH_DIST]);
             }
 
-            array_of_data_set[i]->insert(keys[i]);
+            array_of_data_set[i]->emplace_with_hash(hash_values[i], keys[i]);
         }
     }
 
@@ -193,11 +199,17 @@ class AggregateFunctionUniq final
         const KeyType* keys = get_keys(keys_container, *columns[0], batch_size);
         auto& set = this->data(place).set;
 
+        // Precompute hash values to avoid double computation in prefetch + insert
+        std::vector<size_t> hash_values(batch_size);
+        for (size_t i = 0; i < batch_size; ++i) {
+            hash_values[i] = set.hash(keys[i]);
+        }
+
         for (size_t i = 0; i != batch_size; ++i) {
             if (i + HASH_MAP_PREFETCH_DIST < batch_size) {
-                set.prefetch(keys[i + HASH_MAP_PREFETCH_DIST]);
+                set.prefetch_hash(hash_values[i + HASH_MAP_PREFETCH_DIST]);
             }
-            set.insert(keys[i]);
+            set.emplace_with_hash(hash_values[i], keys[i]);
         }
     }
 
diff --git a/be/src/exprs/aggregate/aggregate_function_uniq_distribute_key.h b/be/src/exprs/aggregate/aggregate_function_uniq_distribute_key.h
index 8d44d74d03e22b..35c2f5f7f2a0f6 100644
--- a/be/src/exprs/aggregate/aggregate_function_uniq_distribute_key.h
+++ b/be/src/exprs/aggregate/aggregate_function_uniq_distribute_key.h
@@ -122,13 +122,19 @@ class AggregateFunctionUniqDistributeKey final
             array_of_data_set[i] = &(this->data(places[i] + place_offset).set);
         }
 
+        // Precompute hash values to avoid double computation in prefetch + insert
+        std::vector<size_t> hash_values(batch_size);
+        for (size_t i = 0; i < batch_size; ++i) {
+            hash_values[i] = array_of_data_set[i]->hash(keys[i]);
+        }
+
         for (size_t i = 0; i != batch_size; ++i) {
             if (i + HASH_MAP_PREFETCH_DIST < batch_size) {
-                array_of_data_set[i + HASH_MAP_PREFETCH_DIST]->prefetch(
-                        keys[i + HASH_MAP_PREFETCH_DIST]);
+                array_of_data_set[i + HASH_MAP_PREFETCH_DIST]->prefetch_hash(
+                        hash_values[i + HASH_MAP_PREFETCH_DIST]);
             }
 
-            array_of_data_set[i]->insert(keys[i]);
+            array_of_data_set[i]->emplace_with_hash(hash_values[i], keys[i]);
         }
     }
 
@@ -138,11 +144,17 @@ class AggregateFunctionUniqDistributeKey final
         const KeyType* keys = get_keys(keys_container, *columns[0], batch_size);
         auto& set = this->data(place).set;
 
+        // Precompute hash values to avoid double computation in prefetch + insert
+        std::vector<size_t> hash_values(batch_size);
+        for (size_t i = 0; i < batch_size; ++i) {
+            hash_values[i] = set.hash(keys[i]);
+        }
+
         for (size_t i = 0; i != batch_size; ++i) {
             if (i + HASH_MAP_PREFETCH_DIST < batch_size) {
-                set.prefetch(keys[i + HASH_MAP_PREFETCH_DIST]);
+                set.prefetch_hash(hash_values[i + HASH_MAP_PREFETCH_DIST]);
             }
-            set.insert(keys[i]);
+            set.emplace_with_hash(hash_values[i], keys[i]);
         }
     }