https://bugs.kde.org/show_bug.cgi?id=384953

--- Comment #5 from Daniel Santos <daniel.san...@pobox.com> ---
(In reply to Sven Brauch from comment #4)
> Seemingly weird question, is the welcome page (with the KDevelop logo and
> the seesion list) showing when you experience this problem?

I guess that's not weird, I know it's been a bit sluggish sometimes for me in
the past (still using a Phenom-based machine!), but it isn't open.


> I don't have that issue here and there is quite certainly not a lock in
> place causing this ... the dialog is provided by a completely separate
> component, and has no shared code with the rest of the IDE ...

I guess this is one of those wonderful mysteries.  So I ran iotop while doing
this and trying a few different things out.  The I/O hovers between 35 and 50%
during parsing, so I wouldn't expect I/O waits for the open dialog to be very
long (I have a 3-device software RAID 5 array).  Moving the scroll bar or
typing in the code editor lags by around 100 to 500-ish milliseconds during
parsing with 4 threads.  In the open dialog, it is sometimes perfectly
responsive, with HID events being processed in less time that I can perceive
(this may be towards the beginning of parsing?).  Then it will suddenly change
to where response times vary between 2 to 20-ish seconds, with an average
somewhere around 8-10.

Unfortunately I'm unfamiliar with both KDE and QT, so I wouldn't be sure where
to start trying to diagnose the underlying cause.  If I "stop-all" then the
open dialog behaves normally.  I'll see if I can learn anything in gdb.

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