diff --git a/mallchat-common/src/main/java/com/abin/mallchat/common/user/service/cache/UserCache.java b/mallchat-common/src/main/java/com/abin/mallchat/common/user/service/cache/UserCache.java
index 7bee2ac..4302ac3 100644
--- a/mallchat-common/src/main/java/com/abin/mallchat/common/user/service/cache/UserCache.java
+++ b/mallchat-common/src/main/java/com/abin/mallchat/common/user/service/cache/UserCache.java
@@ -128,7 +128,7 @@ public class UserCache {
     @Cacheable(cacheNames = "user", key = "'blackList'")
     public Map<Integer, Set<String>> getBlackMap() {
         Map<Integer, List<Black>> collect = blackDao.list().stream().collect(Collectors.groupingBy(Black::getType));
-        Map<Integer, Set<String>> result = new HashMap<>();
+        Map<Integer, Set<String>> result = new HashMap<>(collect.size());
         for (Map.Entry<Integer, List<Black>> entry : collect.entrySet()) {
             result.put(entry.getKey(), entry.getValue().stream().map(Black::getTarget).collect(Collectors.toSet()));
         }
diff --git a/mallchat-custom-server/src/main/java/com/abin/mallchat/custom/chat/controller/ChatController.java b/mallchat-custom-server/src/main/java/com/abin/mallchat/custom/chat/controller/ChatController.java
index b667b07..bf89bd0 100644
--- a/mallchat-custom-server/src/main/java/com/abin/mallchat/custom/chat/controller/ChatController.java
+++ b/mallchat-custom-server/src/main/java/com/abin/mallchat/custom/chat/controller/ChatController.java
@@ -60,7 +60,8 @@ public class ChatController {
     }
 
     private void filterBlackMember(CursorPageBaseResp<ChatMemberResp> memberPage) {
-        memberPage.getList().removeIf(a -> getBlackUidSet().contains(a.getUid().toString()));
+        Set<String> blackMembers = getBlackUidSet();
+        memberPage.getList().removeIf(a -> blackMembers.contains(a.getUid().toString()));
     }
 
     private Set<String> getBlackUidSet() {
@@ -82,7 +83,8 @@ public class ChatController {
     }
 
     private void filterBlackMsg(CursorPageBaseResp<ChatMessageResp> memberPage) {
-        memberPage.getList().removeIf(a -> getBlackUidSet().contains(a.getFromUser().getUid().toString()));
+        Set<String> blackMembers = getBlackUidSet();
+        memberPage.getList().removeIf(a -> blackMembers.contains(a.getFromUser().getUid().toString()));
         System.out.println(1);
     }