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List:       kde-bugs-dist
Subject:    [kate] [Bug 378330] New: Kate is very slow when deleting or pasting a lot of text
From:       Aaron Williams <bugzilla_noreply () kde ! org>
Date:       2017-03-31 23:58:47
Message-ID: bug-378330-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=378330

            Bug ID: 378330
           Summary: Kate is very slow when deleting or pasting a lot of
                    text
           Product: kate
           Version: unspecified
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kwrite-bugs-null@kde.org
          Reporter: aaronw@doofus.org
  Target Milestone: ---

I am copying and pasting logs from a konsole session that contain 7000-12000
lines of text, often 100 columns wide.

As I update the logs I select all of the text in a window (<ctrl> A) then hit
<backspace> to delete the text. This takes many seconds to complete with the
CPU pegged at 100%. This is plain text. The select all is fast but the delete
operation is quite slow.

Next I select all of the text in a konsole session with a large buffer which
can contain upwards of 12000 lines of text from minicom then type <ctrl V> to
paste it into Kate. This takes several minutes to complete, again with the CPU
pegged at 100%.

I also see that Kate is using roughly 3.7GB of virtual memory (518K resident).

Note that this is Kate 3.14.9.

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