patch 7.4.1535
Problem:    The feedkeys test has a one second delay.
Solution:   Avoid need_wait_return() to delay. (Hirohito Higashi)
diff --git a/src/eval.c b/src/eval.c
index edb2b25..9f56126 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -11869,7 +11869,14 @@
 	    if (vgetc_busy)
 		typebuf_was_filled = TRUE;
 	    if (execute)
+	    {
+		int save_msg_scroll = msg_scroll;
+
+		/* Avoid a 1 second delay when the keys start Insert mode. */
+		msg_scroll = FALSE;
 		exec_normal(TRUE);
+		msg_scroll |= save_msg_scroll;
+	    }
 	}
     }
 }