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https://issues.apache.org/jira/browse/PDFBOX-2117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018663#comment-14018663
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Tilman Hausherr commented on PDFBOX-2117:
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While the lookup table sounds like a good idea at first, I wonder what will
happen in a multithreading case. There's only one PDDeviceXX object so I think
the lookup table handling should be secured against multiple requests at the
same time.
> AxialShadingContext is slow
> ---------------------------
>
> Key: PDFBOX-2117
> URL: https://issues.apache.org/jira/browse/PDFBOX-2117
> Project: PDFBox
> Issue Type: Bug
> Reporter: Petr Slaby
> Attachments: AxialShading.patch
>
>
> AxialShadingContext#getRaster() is on top of profiler hot spots in documents
> that use an axial shading. Inside it, the slowest part is calling
> PDColorSpaceRGB#toRGB() and PDFunctionType3#eval() (in this order).
>
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