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https://issues.apache.org/jira/browse/PDFBOX-3688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870376#comment-15870376
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ASF subversion and git services commented on PDFBOX-3688:
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Commit 1783259 from [~tilman] in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1783259 ]
PDFBOX-3688: avoid keeping objects after TexturePaint is created
> Cache TilingPaint generation
> ----------------------------
>
> Key: PDFBOX-3688
> URL: https://issues.apache.org/jira/browse/PDFBOX-3688
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.4
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Fix For: 2.0.5, 2.1.0
>
> Attachments: gs-bugzilla692158-schleuse-veryslow.pdf
>
>
> The attached file gs-bugzilla692158-schleuse-veryslow.pdf is extremely slow
> to render. It takes hours. The cause is that identical TilingPaint objects
> are generated again and again, i.e. each time the pattern image must be drawn
> again. I tried a very simple caching mechanism and now the file renders in 20
> seconds.
> Although the very basic caching worked for all test files, it can't be used
> because parameters could change: initial matrix, xform, color and colorspace.
> For this I'll use a factory class that has a class to compare the parameters,
> and this is to be used as key.
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