Very slow PDF rendering
Reported by
anestl...@gmail.com,
Jun 15 2016
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Issue descriptionUserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.84 Safari/537.36 Example URL: http://www.samsung.com/semiconductor/global/file/insight/2016/04/SolutionBrief_for_Mobile_Smartphone-0.pdf Steps to reproduce the problem: Try to scroll http://www.samsung.com/semiconductor/global/file/insight/2016/04/SolutionBrief_for_Mobile_Smartphone-0.pdf What is the expected behavior? Smooth scrolling. What went wrong? CPU usage 100%, it takes several seconds to scroll to the next page. Does it occur on multiple sites: N/A Is it a problem with a plugin? No Did this work before? No Does this work in other browsers? Yes Chrome version: 51.0.2704.84 Channel: stable OS Version: CentOS 7.0 64 Flash Version: Shockwave Flash 21.0 r0
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Jun 15 2016
Hang on and see if fixing bug 619117 leads to a better user experience.
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Oct 10 2016
So how is the performance in Chrome 53 or newer?
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Oct 11 2016
Chrome 53 is several times faster but still scrolling is very CPU intensive (pegged at 100%) and not smooth. I firmly believe completely static documents should consume no more than 5% of CPU for scrolling. Mind that Acrobat Reader 9.0 for Linux rerenders every new page while scrolling, IOW it cannot properly cache pages, and it's scrolling even slower than Chrome 53. Acrobat Reader 11 for Windows is also unable to properly cache the pages of this document and rerenders them all the time and the application is also very slow. We may consider this bug resolved however I think Chrome could have been made even faster/better but it's up to you.
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Oct 11 2016
Thanks for checking in. I will indeed close this issue. We have plans for improvements file under a different bug: https://bugs.chromium.org/p/pdfium/issues/detail?id=523 |
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Comment 1 by anestl...@gmail.com
, Jun 15 2016