[konsole] [Bug 503586] New: Poor search performance

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https://bugs.kde.org/show_bug.cgi?id=503586

            Bug ID: 503586
           Summary: Poor search performance
    Classification: Applications
           Product: konsole
           Version: 25.04.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: kndevl at outlook.com
  Target Milestone: ---

I often work with large scrollback buffers in Konsole. Recently, Konsole has
started highlighting the lines on the scrollbar for search hits. With large
buffers, this is quite slow (in the order of a few minutes) on a modern
notebook cpu. This also freezes the UI so I can't really do anything else with
Konsole.

Ideally Konsole should allow disabling this feature. Konsole should also
disable this feature when the scrollback buffer size is set above a certain
limit.

I believe this is a regression because Konsole had handled search in large
buffers just fine before.

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