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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] Commented: (JCR-1963) Determination of property state difference should skip binary values
Date Wed, 25 Feb 2009 12:56:02 GMT

    [ https://issues.apache.org/jira/browse/JCR-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12676636#action_12676636
] 

Michael Dürig commented on JCR-1963:
------------------------------------

Further investigation shows that

a) property diffing is sometimes done even if the result is not used by the caller.

b) property diffing occurs very frequently when the same session is accessed concurrently
from within different threads.

I will fix a) in jcr2spi. Case b) is invalid since it's the client's responsibility to synchronize
access to sessions. 

> Determination of property state difference should skip binary values
> --------------------------------------------------------------------
>
>                 Key: JCR-1963
>                 URL: https://issues.apache.org/jira/browse/JCR-1963
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-jcr2spi
>            Reporter: Michael Dürig
>
> o.a.j.jcr2spi.state.PropertyState.diffPropertyData, PropertyData) should alway consider
two binary values to be different. The current implementation compares two binary values with
equals(). An implementation will in general have to do a byte by byte comparison of both values.
This is most likely always more expensive than considering the values different right from
the start. 

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