Tilman Hausherr created PDFBOX-3763:
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Summary: Optimize SampledImageReader.getStencilImage()
Key: PDFBOX-3763
URL: https://issues.apache.org/jira/browse/PDFBOX-3763
Project: PDFBox
Issue Type: Bug
Components: Rendering
Affects Versions: 2.0.5
Reporter: Tilman Hausherr
Assignee: Tilman Hausherr
Fix For: 2.0.6, 3.0.0
I have an PDF file (which I can't share, it is p182 of the one from
https://stackoverflow.com/questions/43248021/pdfbox-2-unusual-memory-consumption
) that needs over 3GB for rendering due to two stencil images that are 18694 x
13214. PDFBox converts stencil images to RGB images, where 1 pixel needs 4
bytes, so such an image uses 1GB.
After many dead ends over the easter weekend, I realized today that the
BufferedImage isn't needed at all - we can process the bits directly.
Memory footprint is down from 3.6GB to 1.7GB and it is faster too.
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