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http://jira.magnolia-cms.com/browse/MAGNOLIA-3331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=30544#action_30544
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Philipp Bärfuss commented on MAGNOLIA-3331:
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Thanks for the patch.
I preferred if the QueryResult.getContent() would return a lazy collection.
Doing so the benefit would be much bigger than by adding a new method. By
adding a new method it is probably hard to benefit from the improvement in STK
without rewriting tons of models.
But then I just wonder how we could handle collection.size(). Either this
causes then a full read operation or it returns the value of the JCR
QueryResult, which might not be correct due to permission restrictions (the
query could for instance return 100 items but the current user can only read 1).
WDYT
FYI: In 5.0 we will start to use the JCR API and iterators to make every thing
more performant.
> Provide for maxResultSize in Query-API
> --------------------------------------
>
> Key: MAGNOLIA-3331
> URL: http://jira.magnolia-cms.com/browse/MAGNOLIA-3331
> Project: Magnolia
> Issue Type: Improvement
> Components: core
> Reporter: Jörg von Frantzius
> Assignee: Philipp Bärfuss
> Attachments: magnolia-core.patch
>
>
> Currently when executing a query through the Magnolia query API, there is no
> way of preventing the result set from being iterated completely. When e.g.
> only the first couple of objects from a large result set are of interest,
> then thousands of objects are instantiated unnecessarily, resulting in a huge
> performance penalty.
> These problems have been addressed in the [openmind Magnolia Criteria
> API|http://www.openmindlab.com/lab/products/mgnlcriteria.html], but this
> cannot be used e.g. for the STK implementation.
> So in order to optimize e.g. the STK, the core query API must be extended.
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