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https://issues.apache.org/jira/browse/OAK-924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13768397#comment-13768397
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Michael Dürig edited comment on OAK-924 at 9/17/13 7:43 AM:
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Much of the observed slowness is caused by getting nodes with anonymous is
slow. See OAK-1018. Running the test with the admin user gives about 250% speed
up. Caching {{jcr:system/namespaces}} across sessions and using a {{BiMap}}
instead of a plain {{Map}} in {{SessionNameSpaces}} results in another 250%
speed up.
was (Author: mduerig):
Much of the observed slowness is caused by getting nodes with anonymous is
slow. See OAK-1018. Running the test with the admin user gives about 250% speed
up. Caching {{jcr:system/namespaces}} across sessions and using a {{BiMap}}
instead of a plain {{Map}} in {{SessionNameSpaces}} results in another 205%
speed up.
> Optimize namespace lookups
> --------------------------
>
> Key: OAK-924
> URL: https://issues.apache.org/jira/browse/OAK-924
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: core, jcr
> Reporter: Jukka Zitting
> Assignee: Jukka Zitting
> Attachments: OAK-924-bench.patch
>
>
> The current namespace handling code does a lot of repetitive work, which
> shows up in hotspots like XML imports and Sling's namespace mapping code.
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