[Libreoffice-bugs] [Bug 114050] New: Image compression seems to be rather slow and CPU hogging for high resolution images

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=114050

            Bug ID: 114050
           Summary: Image compression seems to be rather slow and CPU
                    hogging for high resolution images
           Product: LibreOffice
           Version: 4.2.0.4 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: telesto at surfxs.nl

Description:
Image compression seems to be rather slow and CPU hogging for high resolution
images

Steps to Reproduce:
1. Open the attached file
2. Compress the image to jpg 90; 200 dpi with any Interpolation filter
(Lanczos)

Actual Results:  
Takes around 5 seconds to compress with a progression bar (and LibO
unresponsive)

Expected Results:
2 second or so (FastStone image viewer/IrfanView)


Reproducible: Always


User Profile Reset: No



Additional Info:
Found in
Version: 6.0.0.0.alpha1+
Build ID: c24c32bf71b8e64bd0d36e511f554e1f6c015842
CPU threads: 4; OS: Windows 6.3; UI render: default; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2017-11-22_23:15:41
Locale: nl-NL (nl_NL); Calc: group threaded

and in 
4.2.0.4


User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101
Firefox/52.0

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