[Libreoffice-bugs] [Bug 112000] New: Calc slow response marking columns or sections in sparse spreadsheets

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=112000

            Bug ID: 112000
           Summary: Calc slow response marking columns or sections in
                    sparse spreadsheets
           Product: LibreOffice
           Version: 5.4.0.3 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: lo.severach at spamgourmet.com

Description:
A spreadsheet with alternating blank rows makes many column and area mark
operations slow.


Steps to Reproduce:
New spreadsheet
Create solid block of A from A1 to N32000
  Place "A" in A1. Select A1. Copy to clipboard.
  Mark A1:N32000, paste, yes to overwrite. Note the fast paste.
Select each column individually A then B then C.. to N. Note the fast response.
Fast response is expected behavior.

Close all, new spreadsheet.
Create block of A from A1 to N32000 with all even lines blank.
  Place "A" in A1, leave A2 blank.
  Select A1-A2, copy to clipboard.
  Select A1:N32000, paste, yes to overwrite. Note slow paste.
Mark each column as before. Note slow response.
Slow response is unexpected behavior.

Close all, new spreadsheet.
Create solid block of A from A1 to N32000
Change column A so it is blank every other row.
Mark column A is slow. Marking all other columns is fast.


Actual Results:  
See above.

Expected Results:
See above.


Reproducible: Always

User Profile Reset: No. It happens on multiple computers.

Additional Info:
This is likely to affect blank every other column but that has not been tested.


User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101
Firefox/55.0

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