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https://issues.apache.org/jira/browse/OAK-2056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14244035#comment-14244035
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Davide Giannella commented on OAK-2056:
---------------------------------------
Committed in http://svn.apache.org/r1644863 (trunk) a scalability
benchmark for measuring any potential code changes in the future.
Run on my local with the command
{noformat}
java -Xmx2048m -Dincrements="10,100,1000,5000" -Dindex=false \
-jar oak-run*.jar scalability \
--base /var/tmp/oak/ ScalabilityBlobSearchSuite:OrderByDate Oak-Tar
{noformat}
and these are the results
{noformat}
# OrderByDate min 10% 50% 90% max N
Oak-Tar 31 31 764 35351 35351 4
# Iterations/Load 10 100 1000 5000
Time (ms) 31 51 1476 35351
{noformat}
> Optimize orderings by date fields
> ---------------------------------
>
> Key: OAK-2056
> URL: https://issues.apache.org/jira/browse/OAK-2056
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: query
> Affects Versions: 1.0.4, 1.0.8
> Reporter: Przemo Pakulski
> Labels: performance
>
> Sorting by date fields is very slow in oak, especially if result set size is
> large.
> I'm running the following JCR-SQL2 query
> {code}
> SELECT * FROM [cq:PageContent] AS [c] WHERE ISDESCENDANTNODE('/content')
> {code}
> which returns 3270 results on my oak repo.
> {noformat}
> Query execution times are as below
> ---------------------------------------
> No order clause | 0,147 sec
> ORDER BY [jcr:title] | 1,203 sec
> ORDER BY [jcr:createdBy] | 1,018 sec
> ORDER BY [jcr:created] | 25,229 sec
> {noformat}
> Ordering by date field adds extra 24 seconds overhead.
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