[Konsole-devel] [Bug 253314] New: Konsole performance: programs that print a lot of text on stdout/stderr slow down a lot

[Yuri]

https://bugs.kde.org/show_bug.cgi?id=253314

           Summary: Konsole performance: programs that print a lot of text
                    on stdout/stderr slow down a lot
           Product: konsole
           Version: unspecified
          Platform: FreeBSD Ports
        OS/Version: FreeBSD
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: konsole-devel at kde.org
        ReportedBy: yuri at tsoft.com


Version:           unspecified (using KDE 4.4.5) 
OS:                FreeBSD

When I work in terminal I often run something that prints a lot of text.
Konsole apparently attempts to display every single line for a quick few
milliseconds. As a result lines aren't readable and slow down is introduced.

Desired behavior: konsole should detect that there is more text printed than it
can display with normal timing. In such condition konsole should be skipping
through text, only displaying some randomly selected fragments for some
intervals of time that would allow human to perceive them to some extent. Make
such interval user-configurable. Also it would be nice to have some idea how
many lines were printed, so konsole can display, for example, 150000 lines/sec
in the corner when the speed is very high.

For example, this slowdown was caused by konsole: user=20152ms sys=403ms
wall=73273ms

Of course, there is always a workaround of just directing the output into file.
But my suggestion makes konsole itself more graceful and nicer to user.

Reproducible: Didn't try

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