[Konsole-devel] [konsole] [Bug 365339] New: Several seconds delay switching to certain tabs
Andreas Hartmetz via KDE Bugzilla
bugzilla_noreply at kde.org
Mon Jul 11 00:06:33 UTC 2016
Bug ID: 365339
Summary: Several seconds delay switching to certain tabs
Platform: Compiled Sources
Assignee: konsole-devel at kde.org
Reporter: ahartmetz at gmail.com
I like to use infinite scrollback. Since recently, it takes several seconds to
switch to tabs with many thousands of lines of scrollback, such as from
compiling a large project with qmake. From the attached backtrace (and other
gdb info dump) it looks like konsole's filtering for highlighting etc. is what
is taking so long. I think it's probably scanning more than it has to, which
would be really just the current screen. And it probably handled it more
Needless to say, the current behavior is quite annoying.
Steps to Reproduce:
1. Get a few thousand lines of scrollback in a tab (compiling something with
qmake works well)
2. Make sure that the scrollback is still growing (konsole is smart enough not
to rescan completely constant contents)
3. Switch to another tab
4. Switch back to the tab with lots of lines
konsole hangs for some time before the tab with the long scrollback is shown.
konsole shows the tab with the long scrollback quasi-instantly, which it used
to do before.
I think this is major because it kind of kills the infinite scrollback feature
and even makes tab switching with "just" 1000 lines a bit slower.
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