[jira] [Updated] (PDFBOX-1996) PDSeparation optimization
[ https://issues.apache.org/jira/browse/PDFBOX-1996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andreas Lehmkühler updated PDFBOX-1996: --- Fix Version/s: 2.0.0 > PDSeparation 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 >Priority: Minor > Fix For: 2.0.0 > > Attachments: pdfbox.patch, pdfbox.patch > > > 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 (v6.3.4#6332) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-1996) PDSeparation optimization
[ https://issues.apache.org/jira/browse/PDFBOX-1996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Dave Smith updated PDFBOX-1996: --- Attachment: pdfbox.patch Here is a patch that is HashMap friendly that caches all calculated values PDSeparation 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 Priority: Minor Attachments: pdfbox.patch, pdfbox.patch 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)
[jira] [Updated] (PDFBOX-1996) PDSeparation optimization
[ https://issues.apache.org/jira/browse/PDFBOX-1996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-1996: Summary: PDSeparation optimization (was: PDSeparation separation optimization) PDSeparation 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 Attachments: pdfbox.patch 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)
[jira] [Updated] (PDFBOX-1996) PDSeparation optimization
[ https://issues.apache.org/jira/browse/PDFBOX-1996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] John Hewson updated PDFBOX-1996: Priority: Minor (was: Major) PDSeparation 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 Priority: Minor Attachments: pdfbox.patch 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)
