[Libreoffice-bugs] [Bug 124450] New: Libreoffice Calc: Autofilter functions are slow

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124450

            Bug ID: 124450
           Summary: Libreoffice Calc: Autofilter functions are slow
           Product: LibreOffice
           Version: 6.2.2.2 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: juhani.suhonen73 at gmail.com

Description:
Autofilter functions are really slow with large (>100.000 entries) lists. This
makes autofilters practically unusable. Improving sorting algorithm would
significantly speed up autofilters.

Steps to Reproduce:
1.Create spreadsheet with >100.000 lines
2.Apply Autofilter to first row
3.Try to open Autofilter dropdown menu -> Calc freezes for >60 seconds

Actual Results:
happens 100% of the time, regardless of OS and HW

Expected Results:
Eventually calc will resume, but slowness makes it unusable


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Simple sorting algorithm would speed up opening autofilters by factor of 1000.

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