[Libreoffice-bugs] [Bug 126326] New: FILESAVE XLSX Saving empty file with many sheets is slow

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=126326

            Bug ID: 126326
           Summary: FILESAVE XLSX Saving empty file with many sheets is
                    slow
           Product: LibreOffice
           Version: 6.4.0.0.alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: libreoffice at nisz.hu

Description:
If a spreadsheet contains many (~250) sheets, saving it to XLSX takes a rather
long time.

Steps to Reproduce:
1.      Open Settings – Calc – Defaults and change the number of sheets in a
new document to 250
2.      Create a new spreadsheet.
3.      Save it to XLSX


Actual Results:
The save takes about 20 seconds in LO 6.2.0.
In LO 6.4master it is still about 15 seconds. 
Similarly it takes 15-20 seconds in:

Verzió: 5.0.0.5
Build az.: 1b1a90865e348b492231e1c451437d7a15bb262b
Területi beállítások: hu-HU (hu_HU)

Verzió: 4.2.0.4
Build az.: 05dceb5d363845f2cf968344d7adab8dcfb2ba71

Verzió: 4.1.0.4
Build az.: 89ea49ddacd9aa532507cbf852f2bb22b1ace28

It’s much better, about 5 seconds in:
Verzió: 4.0.0.3 (Build az.: 7545bee9c2a0782548772a21bc84a9dcc583b89)



Expected Results:
It should happen faster than that. Excel can do this on the same machine in < 1
second.


Reproducible: Always


User Profile Reset: No



Additional Info:
LibreOffice details:
Version: 6.4.0.0.alpha0+ (x86)
Build ID: 49422a469646ad8be43ba828ca24c2484c26b9e8
CPU threads: 4; OS: Windows 6.3; UI render: GL; VCL: win; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2019-07-08_00:50:19
Locale: hu-HU (hu_HU); UI-Language: en-US
Calc: CL

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