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https://issues.apache.org/jira/browse/TINKERPOP-2033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16614792#comment-16614792
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ASF GitHub Bot commented on TINKERPOP-2033:
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Github user dkuppitz commented on the issue:
https://github.com/apache/tinkerpop/pull/932
VOTE +1
> Maintain order of profile() annotations
> ---------------------------------------
>
> Key: TINKERPOP-2033
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2033
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.4.0
> Reporter: stephen mallette
> Assignee: stephen mallette
> Priority: Minor
> Fix For: 3.4.0
>
>
> The {{annotations}} of {{ImmutableMetrics}} uses a {{ConcurrentHashMap}} but
> that of course loses the insertion order. Convert to a {{synchronizedMap}}
> that takes a {{LinkedHashMap}} to maintain that order as well as the ability
> to support concurrent access which is an issue for some graphs.
> There was some question as to whether or not this change was breaking to the
> Gryo format or not ,but it appears that it is not. Gryo 1.0 and 3.0 remain as
> intact as they were on previous releases, though it is worth noting that Gryo
> 1.0 broke on release on 3.3.0 when it comes to "metrics" serialization so
> that break is still intact. Therefore you can't use Gryo 1.0 between 3.2.x
> and 3.3.x/3.4.x. Not sure how that happened exactly.
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