Improvement - keySet().isEmpty() and values().isEmpty() methods of RMap object aren't efficient. #3298

redisson/src/main/java/org/redisson/RedissonMap.java

@@ -1489,6 +1489,11 @@ public class RedissonMap<K, V> extends RedissonExpirable implements RMap<K, V> {
             this.count = count;
         }
 
+        @Override
+        public boolean isEmpty() {
+            return !iterator().hasNext();
+        }
+
         @Override
         public Iterator<K> iterator() {
             return keyIterator(pattern, count);
@@ -1542,6 +1547,11 @@ public class RedissonMap<K, V> extends RedissonExpirable implements RMap<K, V> {
             this.count = count;
         }
 
+        @Override
+        public boolean isEmpty() {
+            return !iterator().hasNext();
+        }
+
         @Override
         public Iterator<V> iterator() {
             return valueIterator(keyPattern, count);