diff --git a/app/src/main/java/org/astraea/app/admin/NodeInfo.java b/app/src/main/java/org/astraea/app/admin/NodeInfo.java
index 208cdb3410..cd7ad6a275 100644
--- a/app/src/main/java/org/astraea/app/admin/NodeInfo.java
+++ b/app/src/main/java/org/astraea/app/admin/NodeInfo.java
@@ -38,6 +38,9 @@ static NodeInfo of(int id, String host, int port) {
 
   static NodeInfo of(int id, String host, int port, boolean isOffline) {
     return new NodeInfo() {
+      // NodeInfo is used to be key of Map commonly, so creating hash can reduce the memory pressure
+      private final int hashCode = Objects.hash(id, host, port);
+
       @Override
       public String host() {
         return host;
@@ -60,7 +63,7 @@ public int port() {
 
       @Override
       public int hashCode() {
-        return Objects.hash(id, host, port);
+        return hashCode;
       }
 
       @Override