https://bugs.documentfoundation.org/show_bug.cgi?id=153399
Bug ID: 153399
Summary: [UI] Vertical scrolling becomes unresponsive when hide
columns option is used such that the background is
visible
Product: LibreOffice
Version: 7.4.4.2 release
Hardware: x86-64 (AMD64)
OS: Windows (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Calc
Assignee: [email protected]
Reporter: [email protected]
Description:
If you select all columns, unselect a few columns, then use the "hide columns"
option, everything will be hidden except the columns you select.
If you unselect so few columns that you can see the blank background behind the
cells, libreoffice calc becomes extremely laggy. This issue ONLY happens if the
blank background is either on screen or closely cut off by the edge of the
window. Performance remains stable when only a few cells are visible, as long
as the edge of the window cuts off the background.
This issue is also confined to the specific window where problems are
occurring. If there are multiple spreadsheets open in different windows, only
the spreadsheet(s) with the background visible will experience lag while the
others will not.
Steps to Reproduce:
1. Open localc 7.4.4.1 or later
2. Select All
3. Deselect zero or more columns
4. Hide all selected Columns
5. If many columns are not hidden, ensure that some of the background is
visible on screen
6. Observe lag when scrolling up or down
Actual Results:
Lag is observed when scrolling up or down
Expected Results:
No lag is observed when scrolling up or down
Reproducible: Always
User Profile Reset: Yes
Additional Info:
I tested every version on the archives until the bug went away to determine the
earliest affected version, which is 7.4.4.1, however only 7.4.4.2 shows up on
the version menu. Version 7.4.4.1 took almost an hour to download from the
archives while the other versions I checked took only about a minute, so it
would be nice to get that fixed as well. I included version info for both
7.4.4.1 and 7.4.4.2.
7.4.4.1 Version Info:
Version: 7.4.4.1 (x64) / LibreOffice Community
Build ID: 988f4a351a6fa8cf4bdf2bdc873ca12cf8cbe625
CPU threads: 16; OS: Windows 10.0 Build 19043; UI render: Skia/Raster; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: CL
7.4.4.2 Version Info:
Version: 7.4.4.2 (x64) / LibreOffice Community
Build ID: 85569322deea74ec9134968a29af2df5663baa21
CPU threads: 16; OS: Windows 10.0 Build 19043; UI render: Skia/Raster; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: CL
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