https://bugs.documentfoundation.org/show_bug.cgi?id=148492

            Bug ID: 148492
           Summary: EDITING: Ctrl+Cursor jumping slow in jumbo sheet with
                    freezed columns
           Product: LibreOffice
           Version: 7.4.0.0 alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Description:
Jumping back from the last row by ctrl-cursor up is slow in Calc jumbo sheets
if there are freezed columns.

Steps to Reproduce:
0. Enable jumbo sheets in Calc
1. Open attached file jumbo_freezed_jump_end.ods (B2 is freezed -> column A and
row 1 are freezed)
2. Jump to last row in column B by reapting ctrl-cursor down until the last row
is reached
3. Jump up by ctrl-cursor up

Actual Results:
Slow response (delay of 7s on my machine) and high CPU

Expected Results:
Same behavior as without freezed column -> instant jump


Reproducible: Always


User Profile Reset: No



Additional Info:
If column freezing is removed, jumping up from last row is fast again.

Version: 7.4.0.0.alpha0+ / LibreOffice Community
Build ID: 33fe4909e29654faeef7f665f31ff31776ecfeec
CPU threads: 4; OS: Linux 5.3; UI render: default; VCL: x11
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded Jumbo


I'm using Intel i7-4500U 1.8GHz CPU (Haswell).

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