Fwd: OutputModel performance

Milian Wolff mail at milianw.de
Sun Mar 17 01:40:05 UTC 2013

On Friday 08 February 2013 00:29:12 Andreas Pakulat wrote:
> Hi,
> On Thu, Feb 7, 2013 at 11:09 PM, Andreas Pakulat <apaku at gmx.de> wrote:
> >> b) create an active worker object that is moved to a thread, then let
> >> that do the classification. I.e.:
> >> 
> >> output line (QString) -> active object, run regexps -> (Categorized Data)
> >> -> OutputModel
> > 
> > I'd rather have a worker-object running in a QThread-with-event-loop,
> > this has a slot to give it lines and emits a signal with batches of
> > parsed-data (i.e. 50 or so). Then every time lines are added to the
> > model, a signal is emitted which connects via queued-connection to the
> > worker, that one adds the lines to its internal queue and processes
> > lines. Once it has a batch of 50 done, it emits them and the
> > outputmodel gets that through a queued-connection to add it to the
> > model data and notify the view. That should be safe enough to not
> > introduce many regressions and should solve the ui-lockup.
> Since I was bored I've tried this now in the
> wip/filter_output_threaded branch. Unfortunately the outputmodeltest
> crashes and I'm too tired to debug the reason, its likely though
> because the outputmodel is deleted while the background thread is
> still running. I don't see a good way of stopping it earlier than the
> destructor at the moment.

Fixed that some time ago and finally merged the code into master now.

Please test, everyone!

Milian Wolff
mail at milianw.de
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