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)
