[jboss-jira] [JBoss JIRA] (JGRP-2011) Rsp: optimize in-memory size

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban resolved JGRP-2011.
----------------------------
    Resolution: Done


> Rsp: optimize in-memory size
> ----------------------------
>
>                 Key: JGRP-2011
>                 URL: https://issues.jboss.org/browse/JGRP-2011
>             Project: JGroups
>          Issue Type: Enhancement
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>            Priority: Minor
>             Fix For: 3.6.8, 4.0
>
>
> The in-memory size of {{Rsp}} can be made smaller. Currently, it looks like this:
> {noformat}
> public class Rsp {
>     protected boolean         received;
>     protected boolean         suspected;
>     protected boolean         unreachable;
>     protected final Address sender;
>     protected T                    retval;
>     protected Throwable     exception;
> }
> {noformat}
> Optimizations:
> # received, suspected and unreachable can be compacted into a byte field (flags)
> # retval and exception can be merged into {{Object value}}
> # sender can be removed: {{RspList}} already has the sender
> New format:
> {noformat}
> public class Rsp {
>     protected byte             flags;
>     protected Object           value;
> }
> {noformat}
> Size of {{Rsp}} is 32 bytes (used JOL to measure) before, and 24 bytes after the changes.



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