https://bugs.documentfoundation.org/show_bug.cgi?id=153301

            Bug ID: 153301
           Summary: Calc slows down when changing sheets only after saving
           Product: LibreOffice
           Version: 7.4.5.1 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Description:
Whenever I start working on my spreadsheet everything is fine and fast, but as
soon as I save the file once, or the file autosaves, the time to change between
sheets increases drastically. From instant, it takes a few seconds, which
really disrupts the workflow. Sequential saves dont seem to further increase
this delay.


FILESAVE

Steps to Reproduce:
1.Open an ods file with at least 2 sheets with a lot of data
2.Swap between the 2 sheets a few times to get a feeling of the time it takes
to swap
2.Make any small change to the document
3.Save it manually (Or wait for autosave if it is enabled)
4.Swap between the 2 sheets a few times to notice a substantial increase in the
time to swap

Actual Results:
Substantial increase in the time to swap between sheets

Expected Results:
1.Open an ods file with at least 2 sheets with a lot of data
2.Swap between the 2 sheets a few times to get a feeling of the time it takes
to swap
2.Make any small change to the document
3.Save it manually (Or wait for autosave if it is enabled)
4.Swap between the 2 sheets a few times and notice no difference from the time
before saving


Reproducible: Always


User Profile Reset: No

Additional Info:
I am using a 4.1MB spreadsheet with several sheets, some sheets have thousands
or dozens of thousands of lines and dozens of columns, no images, only
hyperlinks. But mostly with sparse data and lots of stylization and formatting
for cells. I use it on Linux Mint 20.3, Cinnamon 5.2.7

I believe I didnt experience this delay in 6.2. But on version 7.2 this bug is
also present.
In previous versions I experienced general delays after saving, but now with
7.4.5.1 I only experience this when swapping sheets.

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