Dave Smith created PDFBOX-1996: ---------------------------------- Summary: PDSeparation separtion optimization Key: PDFBOX-1996 URL: https://issues.apache.org/jira/browse/PDFBOX-1996 Project: PDFBox Issue Type: Improvement Components: Rendering Affects Versions: 2.0.0 Reporter: Dave Smith
I have a 4 page black and white pdf that takes 32 seconds (8 seconds a page) to render. It uses a Separation color space and it has to run numerous functions per pixel that is causing the slow down. I have a patch where I pre calculate the black and white pixels and cache them instead of calculating them every time. This optimization gets the page rendering down to less than a second a page. I will attach my patch. I could see going forward caching all calculated colours , but floats in hash maps are tricky. -- This message was sent by Atlassian JIRA (v6.2#6252)