TCP: unneeded copy when receiving single message ------------------------------------------------ Key: JGRP-1935 URL: https://issues.jboss.org/browse/JGRP-1935 Project: JGroups Issue Type: Enhancement Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.6.4 In {{TCPConnectionMap$TCPConnection$Receiver}}, we create a new byte[] buffer for each received message, based on the length sent before the message. This buffer is subsequently passed to {{BasicTCP}} which calls {{TP.receive()}}. {{TP.receive()}} makes a copy of the buffer if it is a single message (batches are deserialized in the same thread), before passing the copy to one the thread pools to get deserialized and processed. This is an unneeded copy. SOLUTION: add a flag {{needs_copy}} to the {{TP.receive()}} call and don't copy if true.