[Libreoffice-bugs] [Bug 52029] New: FILESAVE very slow save and very big output for a very simple .xlsx file

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52029

             Bug #: 52029
           Summary: FILESAVE very slow save and very big output for a very
                    simple .xlsx file
    Classification: Unclassified
           Product: LibreOffice
           Version: 3.5.5.3 release
          Platform: x86-64 (AMD64)
        OS/Version: Windows (All)
            Status: UNCONFIRMED
          Severity: major
          Priority: medium
         Component: Spreadsheet
        AssignedTo: libreoffice-bugs at lists.freedesktop.org
        ReportedBy: macska at mailinator.com


Created attachment 64153
  --> https://bugs.freedesktop.org/attachment.cgi?id=64153
this is the problematic file

I have a little xlsx file made with MS Office, which takes about 15-20 seconds
to save in LibreOffice. It basically has a SUM formula, some formatting and
numbers.

I also noticed that the previously small file becomes gigantic (550K) after
saving. For example, empty worksheets have a very big xml file in
/xl/worksheets/.  Even if a row is empty, a <row> tag is created for it. Thus,
65536 empty rows are written in the xml file. (Note that this behaviour may
probably indicate a bug, because the maximum number of rows supported is one
million.)

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