https://bugs.documentfoundation.org/show_bug.cgi?id=164993

            Bug ID: 164993
           Summary: FILESAVE XLSX Certain ODS becomes huge when converted
                    to XLSX
           Product: LibreOffice
           Version: 5.4.0.3 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Keywords: bibisectRequest, regression
          Severity: normal
          Priority: medium
         Component: filters and storage
          Assignee: [email protected]
          Reporter: [email protected]
            Blocks: 108897

Convert attachment 124272, a 2.2 MB file from bug 99238 to XLSX, eg. using
--convert to:
soffice.exe --convert-to xlsx testcase_file.ods

=> Resulting XLSX is 347 MB.

Observed with LO Version: 25.8.0.0.alpha0+
(7f8a5594694c5f2861648c36ff7c87a21422f283) and LO 7.4.0.3 / Windows.

Between LO 7.1.0.3 and 7.3.0.3, the XLSX is only 30 MB.
Between LO 6.3.0.4 and 7.0.0.3: 44 MB.
With LO 6.2.0.3: 30 MB.
Between LO 5.4.0.3 and 6.1.0.3: 25 MB.
Between LO 4.0.0.3 and 5.3.0.3: 2 MB.

It would at least be interesting to find the change in 7.4 and 5.4 that is
responsible for the most notable size increases.


Referenced Bugs:

https://bugs.documentfoundation.org/show_bug.cgi?id=108897
[Bug 108897] [META] XLSX (OOXML) bug tracker
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