RKeys.delete execution optimization in non cluster mode

src/main/java/org/redisson/RedissonKeys.java

@@ -251,6 +251,10 @@ public class RedissonKeys implements RKeys {
      */
     @Override
     public Future<Long> deleteAsync(String ... keys) {
+        if (!commandExecutor.getConnectionManager().isClusterMode()) {
+            return commandExecutor.writeAsync(null, RedisCommands.DEL, keys);
+        }
+
         Map<ClusterSlotRange, List<String>> range2key = new HashMap<ClusterSlotRange, List<String>>();
         for (String key : keys) {
             int slot = commandExecutor.getConnectionManager().calcSlot(key);

src/main/java/org/redisson/command/CommandAsyncService.java

@@ -226,11 +226,10 @@ public class CommandAsyncService implements CommandAsyncExecutor {
 
     private NodeSource getNodeSource(String key) {
         int slot = connectionManager.calcSlot(key);
-        NodeSource source = NodeSource.ZERO;
         if (slot != 0) {
-            source = new NodeSource(slot);
+            return new NodeSource(slot);
         }
-        return source;
+        return NodeSource.ZERO;
     }
 
     @Override

src/main/java/org/redisson/connection/ConnectionManager.java

@@ -43,6 +43,8 @@ import io.netty.util.concurrent.Promise;
  */
 public interface ConnectionManager {
 
+    boolean isClusterMode();
+
     <R> Future<R> newSucceededFuture(R value);
 
     ConnectionEventsHub getConnectionEventsHub();

src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java

@@ -116,6 +116,8 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
 
     protected MasterSlaveServersConfig config;
 
+    protected boolean isClusterMode;
+
     protected final Map<ClusterSlotRange, MasterSlaveEntry> entries = PlatformDependent.newConcurrentHashMap();
 
     private final InfinitySemaphoreLatch shutdownLatch = new InfinitySemaphoreLatch();
@@ -150,6 +152,11 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
             this.socketChannelClass = NioSocketChannel.class;
         }
         this.codec = cfg.getCodec();
+        this.isClusterMode = cfg.isClusterConfig();
+    }
+
+    public boolean isClusterMode() {
+        return isClusterMode;
     }
 
     public IdleConnectionWatcher getConnectionWatcher() {