Re: [Pan-devel] Pan2 Very Slow

[Charles Kerr]

John W. M. Stevens wrote:
> On Sun, Apr 15, 2007 at 12:37:59PM -0600, John W. M. Stevens wrote:
> > After a recent upgrade to Debian 4.0 (Etch), I decided to try to
> > upgrade from pan 0.14.2.91 to pan 0.127.  To my surprise, downloading
> > new headers from news groups has slowed down by almost a factor of
> > fifty.
>
> At a guess, this is a difference in what is being reported, right?
>
> I'm guessing that pan is now reporting number of "parts", not
> number of article headers downloaded.  Good guess, or bad?
>
> > The GUI is a lot less responsive than 0.14, and it regularly hangs for
> > long periods of time (20 to thirty seconds).  On doing some reading,
> > I've found some emails that suggest that the new version is not
> > multi-threaded.  I would suggest a minimum of three threads: One for
> > the GUI, one for the encoder/decoder task, and one for data up/down load.
> > Experiments with the news readers I've written show this as a nice
> > balance between responsivness and network bandwidth usage.
>
> This is still true, and pan-0.127 crashed five times in my attempts to
> work my way through the process of figuring out where it's fragile.

All of this is the opposite of how pan2 is designed to perform and
to how I see it perform every day.  0.127 should be many times faster
than 0.14.x.  How did you get your copy of 0.127?  Also, when the
GUI freezes for 20-30 seconds, are the CPU or hard disk thrashing?

If you're feeling like investigating this further, you might consider
running Pan and sysprof at the same time to see where Pan's spending
all of its time.

Charles