[jira] [Commented] (PDFBOX-3295) Improve parsing performance of object streams

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    [ https://issues.apache.org/jira/browse/PDFBOX-3295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15216795#comment-15216795 ] 

ASF subversion and git services commented on PDFBOX-3295:
---------------------------------------------------------

Commit 1737043 from [~lehmi] in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1737043 ]

PDFBOX-3295: avoid using XrefTrailerResolver#getContainedObjectNumbers as proposed by Andrea Vacondio to speed up the parsing of object streams

> Improve parsing performance of object streams
> ---------------------------------------------
>
>                 Key: PDFBOX-3295
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3295
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Parsing
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Andreas Lehmkühler
>            Assignee: Andreas Lehmkühler
>             Fix For: 2.0.1, 2.1.0
>
>
> Round about a year ago [~torakiki] posted a comment  about some xref refactoring on the dev list:
> {quote}
> few days ago I was profiling PDFBox when loading medium/large size
> documents and I think I found something.
> If you try loading the document
> http://www.adobe.com/devnet/acrobat/pdfs/pdf_reference_1-7.pdf you'll see
> it takes quite some time and that's mostly spent in the
> XrefTrailerResolver.getContainedObjectNumbers. The issue is that every time
> an object contained in an unparsed object stream is found, the
> XrefTrailerResolver performs a full scan of the xref entries found in the
> document, in this case hundreds of thousands. If the object streams are
> many (like in the given doc), it performs many full scans resulting in poor
> performance.
> {quote}



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