https://bugs.freedesktop.org/show_bug.cgi?id=44736

             Bug #: 44736
           Summary: FILEOPEN: Loading RTF files is slow in comparison with
                    LibO 3.4.4 (part of closed bug #44157)
    Classification: Unclassified
           Product: LibreOffice
           Version: LibO 3.5.0 Beta2
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
 Status Whiteboard: BSA
          Severity: normal
          Priority: medium
         Component: Writer
        AssignedTo: [email protected]
        ReportedBy: [email protected]


Created attachment 55510
  --> https://bugs.freedesktop.org/attachment.cgi?id=55510
zipped file (7Zip) with 3 files with the same content, but different formatting

Problem description: Loading RTF files is slow in comparison with LibO 3.4.4.

I attach 3 example files zipped with 7Zip, the content is the same (1000
paragraphs, 421 pages):

1. lorem421pages_unformated.rtf (unformatted)
2. lorem421pages_format_parag.rtf  (paragraphs formatted)
3. lorem421pages_format_parag_and_text.rtf (paragraph and text formatted)

Steps to reproduce:
1. load the files with LibO 3.4.4
2. load the same files with LibO 3.5 Beta 2
3. compare the time needed to load the files

Current behavior:

Average load time until the file is visible in editor
(Word 2007, Lib O3.4.4, LibO 3.5)

File 1: <2 seconds, <4 seconds, <6 seconds 
File 2: <3 seconds, <4 seconds, <10 seconds 
File 3: <3 seconds, <5 seconds, <37 seconds

If the file is heavily formatted, the difference grows bigger and bigger.

Expected behavior:
Load speed nearer to the LibO 3.4.4 speed

Platform (if different from the browser):               
Browser: Mozilla/5.0 (Windows NT 6.0; WOW64; rv:9.0.1) Gecko/20100101
Firefox/9.0.1

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