[Libreoffice-bugs] [Bug 133856] New: ODT file developed in .NET take 8-10 minutes to open in LO Writer as compared to Word just take few seconds

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=133856

            Bug ID: 133856
           Summary: ODT file developed in .NET take 8-10 minutes to open
                    in LO Writer as compared to Word just take few seconds
           Product: LibreOffice
           Version: 6.3.6.2 release
          Hardware: x86 (IA32)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: remus.iftimie at buchanancomputing.co.uk

Description:
I am a .NET developer and I currently work on a reporting project that involves
extracting data from M. Office files and convert them in a new ODF format as
ODT and ODS using IndependentSoft ODF API. I've completed a test file from
simple txt to ODT. The initial text file include a table formed of 55 columns
and 4000-5000 rows. I'm extracting just some specific columns from there and do
some processing background (concatenate some columns) and the final output is
an ODT of no more than 700 kb.
 The issue is when I open the file with LibreOffice it takes around 6 seconds
to open but freezes(can't scroll) until fully loads the table (around 8-10
minutes). But when same file is open with M. Word or ODTViewer is only takes
just a couple of seconds and is loading smoothly in background while I can
scroll and is fully responsive
 I found that the issue is on styling the document. As per data population
there is no problem. So I thought there could be some style to override or some
patch, dll to include on my project 



Steps to Reproduce:
1. ODT developed in .NET and IndependentSoft API
2. Take 6 seconds to open but Not Respondint until fully loaded 8-10 minutes
3. Every time when I open with LO Writer is the same issue

Actual Results:
The opening time is huge

Expected Results:
Normal opening time (few seconds)


Reproducible: Always


User Profile Reset: No



Additional Info:
If I save a copy in M. Word still as ODT extension it triples in size but open
in normal time in LO Writer

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