[jboss-jira] [JBoss JIRA] Commented: (JGRP-806) Message: investigate making the overhead for headers smaller

[Bela Ban (JIRA)]

    [ https://jira.jboss.org/jira/browse/JGRP-806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12423151#action_12423151 ] 

Bela Ban commented on JGRP-806:
-------------------------------

#1 Okay, I changed resize() to be unsynchronized.

#2 I have resize() double its capacity, but then changed it to linear growth. This is optimized for an average number of 3 headers. I certainly never have more than 10 headers, so I didn't want to double the size

#3 The Message.getHeaders() method is not called by any important method other than Event.toString(), which I changed to call Message.printHeaders()

Note that you *can* iterate over the array without producing garbage: the getRawData() method of Headers allows you to do this

> Message: investigate making the overhead for headers smaller
> ------------------------------------------------------------
>
>                 Key: JGRP-806
>                 URL: https://jira.jboss.org/jira/browse/JGRP-806
>             Project: JGroups
>          Issue Type: Task
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 2.6.4, 2.7
>
>
> Related to https://jira.jboss.org/jira/browse/JGRP-805.
> See whether we can make the overhead for ConcurrentHashmap in Message smaller. Potentially reduce the number of buckets for each CCHM (default: 16, IIRC). Or replace CCHMs altogether ?

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