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From "angela (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1501) poor performance on big collections
Date Wed, 15 Oct 2008 15:21:44 GMT

    [ https://issues.apache.org/jira/browse/JCR-1501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639879#action_12639879
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angela commented on JCR-1501:
-----------------------------

i created issue #JCR-1815 to address the problem arising if login/refresh/getNodes are combined
to analyze the performance of big collections.



> poor performance on big collections
> -----------------------------------
>
>                 Key: JCR-1501
>                 URL: https://issues.apache.org/jira/browse/JCR-1501
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-jcr2spi
>            Reporter: Julian Reschke
>
> With JCR-1437, I have added tests for measuring performance, both using "plain" Jackrabbit
and through JCR2SPI.
> There are three tests (inside BigCollectionTest), all creating a collection of 500 nt:file
nodes.
> - testGetChildren just instantiates the nodes
> - testBrowseMinusJcrData simulates browsing (getting metadata), but does not read jcr:data
> - testBrowse   simulates browsing (getting metadata), including obtaining the content
length (jcr:data)
> The tests can be run using
>   mvn -Dtest=JCRBenchmark test
> under both jackrabbit-core and jackrabbit-jcr2spi.
> The results that I see are:
> For plain Jackrabbit:
> testGetChildren: 0.20 ms per iteration
> testBrowseMinusJcrData: 1.15 ms per iteration
> testBrowse: 2.55 ms per iteration
> With JCR2SPI, I see:
> testGetChildren: 281 ms per iteration
> testBrowseMinusJcrData:  577 ms per iteration
> testBrowse: 643 ms per iteration
> So, at least for these tests, JCR2SPI is several orders of magnitude slower.

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