dpcollins-google commented on code in PR #13162:
URL: https://github.com/apache/kafka/pull/13162#discussion_r1104589735


##########
clients/src/main/java/org/apache/kafka/common/utils/Utils.java:
##########
@@ -1225,13 +1226,11 @@ public static long tryWriteTo(TransferableChannel 
destChannel,
      * @param length The number of bytes to write
      * @throws IOException For any errors writing to the output
      */
-    public static void writeTo(DataOutput out, ByteBuffer buffer, int length) 
throws IOException {
+    public static void writeTo(DataOutputStream out, ByteBuffer buffer, int 
length) throws IOException {
         if (buffer.hasArray()) {
             out.write(buffer.array(), buffer.position() + 
buffer.arrayOffset(), length);
         } else {
-            int pos = buffer.position();
-            for (int i = pos; i < length + pos; i++)
-                out.writeByte(buffer.get(i));
+            Channels.newChannel(out).write(buffer);

Review Comment:
   This is producer code, with no compression (the data is pre-encrypted so it 
would be useless anyway) and the message size is 1-2 kB



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