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https://issues.apache.org/jira/browse/PDFBOX-2258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087386#comment-14087386
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simon steiner commented on PDFBOX-2258:
---------------------------------------
The stencil code could be optimised is what I mean.
> SampledImageReader is slow
> --------------------------
>
> Key: PDFBOX-2258
> URL: https://issues.apache.org/jira/browse/PDFBOX-2258
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.0
> Reporter: simon steiner
>
> PDF from PDFBOX-1437
> java -jar ~/pdfbox_th/app/target/pdfbox-app-2.0.0-SNAPSHOT.jar PDFToImage
> AA.pdf
> org.apache.pdfbox.pdmodel.graphics.color.PDDeviceGray.toRGBImage()
> 31.69913 11,472 ms (31.7%) 11,472 ms
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getStencilImage()
> 29.439924 10,654 ms (29.4%) 10,654 ms
> is there some alternative to
> for (int y = 0; y < height; y++)
> {
> for (int x = 0; x < width; x++)
> {
> op
> }
> }
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