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https://issues.apache.org/jira/browse/PDFBOX-2117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14056983#comment-14056983
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Shaola Ren commented on PDFBOX-2117:
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I used the same technique as I did in type 6&7 shading, but different
implements. To me, it's faster when rendering type 2 shading image.
the repository https://bitbucket.org/xinshu/pdfbox.git is up to date
(https://bitbucket.org/xinshu/pdfbox), for this type 2 shading, the code in
AxialShadingContext and PDFunction is modified.
> AxialShadingContext is slow
> ---------------------------
>
> Key: PDFBOX-2117
> URL: https://issues.apache.org/jira/browse/PDFBOX-2117
> Project: PDFBox
> Issue Type: Sub-task
> Components: Rendering
> Reporter: Petr Slaby
> Attachments: 000001_MTEXT_CS6.pdf, AxialShading.patch,
> AxialShading1.patch, AxialShadingContext.java.getrgbimage,
> Shading2Function2.pdf, Shading2Function2.ps, Shading2Function2text.pdf,
> asy-shade.pdf, color_gradient.pdf, shading_pattern.pdf
>
>
> 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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