Enable optimization for less-than-cache-size messages in consumer

Author: milindl

lib/kafkajs/_consumer.js

@@ -574,7 +574,7 @@ class Consumer {
     this.#state = ConsumerState.CONNECTED;
 
     /* Slight optimization for cases where the size of messages in our subscription is less than the cache size. */
-    this.#internalClient.setDefaultIsTimeoutOnlyForFirstMessage(false);
+    this.#internalClient.setDefaultIsTimeoutOnlyForFirstMessage(true);
 
     // Resolve the promise.
     this.#connectPromiseFunc['resolve']();