[jboss-jira] [JBoss JIRA] (JGRP-1765) TP: enable loopback by default and discard own multicasts

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12951575#comment-12951575 ] 

Bela Ban commented on JGRP-1765:
--------------------------------

The advantage over loopback=true is that now we discard the message or message batch without having to parse it. This means (1) we don't have the parsing costs for our own messages and (2) we don't use the thread pool to handle our own messages.
                
> TP: enable loopback by default and discard own multicasts
> ---------------------------------------------------------
>
>                 Key: JGRP-1765
>                 URL: https://issues.jboss.org/browse/JGRP-1765
>             Project: JGroups
>          Issue Type: Enhancement
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>
> Enable {{TP.looback}} by default (deprecate and ignore prop): all messages sent by self are passed right to a thread pool to send them up again.
> When a multicast message sent by self is received, it is currently passed to a thread pool, de-serialized and only then discarded if loopback=true. This means that we create an unneeded buffer for de-serializationand perform de-serialization.
> SOLUTION: discard the multicast from self immediately when receiving it, in {{TP.receive()}}

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