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https://issues.apache.org/jira/browse/PDFBOX-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632636#comment-14632636
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Timo Boehme commented on PDFBOX-2882:
-------------------------------------
I checked the cardinality issue again and found that it is not even needed.
With r1691783 I've made the following changes:
* remove free page counter variable
* remove {{volatile}} from {{file}} and {{raf}} since both are accessed only
under synchronization on same object
{quote}
Why can't we read from a "closed" page?
{quote}
In order to prevent getting different results depending on the setting of
allowed main-memory to use for pages. If we allow reading pages from a closed
page handler an application might function as expected reading an in-memory
page from a wrongly closed page handler. With a different memory setting this
would fail because accessing the page from file is not possible. Thus the user
would assume that there is something wrong with the underlying memory
management but not within its application. I want to prevent this by having the
logical identical behaviour independent of the memory setting. This is in my
eyes a strong reason, especially in a complex application it is quite valuable
to get the correct reason for an error.
> Improve performance when using scratch file
> -------------------------------------------
>
> Key: PDFBOX-2882
> URL: https://issues.apache.org/jira/browse/PDFBOX-2882
> Project: PDFBox
> Issue Type: Improvement
> Components: Parsing
> Affects Versions: 2.0.0
> Reporter: Timo Boehme
> Assignee: Timo Boehme
> Priority: Minor
> Attachments: ScratchFile.java, ScratchFileBuffer.java
>
>
> The current scratch file implementation uses many direct I/O calls which
> slows down parsing compared with in-memory scratch buffer considerably.
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