Re: [Evolution] IMAP speed

[Scott Otterson <scotto u washington edu>]

Hmmm... 

On Tue, 2002-11-19 at 10:25, Jeffrey Stedfast wrote:
> I don't particularly care.
>
> Jeff
>
> On Tue, 2002-11-19 at 13:22, Scott Otterson wrote:
> > Um, Jeff, you missed the point:  the mozilla IMAP connection does not
> > hang when PPP is lost.
> >
> > On Tue, 2002-11-19 at 10:12, Jeffrey Stedfast wrote:
> > > On Tue, 2002-11-19 at 13:01, Scott Otterson wrote:
> > > > Well, first, although the IMAP on 1.2 is supposed to be faster than
> > > > 1.08, several of us have said that IMAP is actually slower.  Seems like
> > > > this information would interest Ximian but on this list, anyway, it
> > > > doesn't seem to be making much of an impression.
> > > >
> > > > Second, if a persistent tcp connection causes evolution to hang, then
> > > > maybe evolution shouldn't be using one.
> > >
> > > this is why there's POP :-)
> > >
> > > IMAP, by definition, uses a persistent tcp connection.
> > >
> > > > On reading your response, my first thought was, "Boy, linux must be
> > > > lame," because on Windows, nothing hangs when you lose your PPP -- not
> > > > outlook, not mozilla, not anything as far as I know.
> > >
> > > wonderful about those win32 apis for finding out when the connection
> > > goes down. Not available on linux.
> > >
> > > >   But then I fired
> > > > up mozilla on linux and found that it too survives having the modem
> > > > unplugged: Read IMAP mail, unplug the modem, plug it back in again,
> > > > reconnect, and mozilla is fine; for the same sequence, evolution hangs.
> > > >
> > > > So what does mozilla use that works better than a persistent tcp
> > > > connection and should evolution be using that instead?
> > >
> > > HTTP != persistent tcp stream. IMAP == persistent tcp stream.
> > >
> > > HTTP connects, does a fetch, and then closes the connection. (well, HTTP
> > > 1.1 can have persistent streams to avoid
> > > connect/disconnect/connect/disconnect but that's another issue).
> > >
> > > IMAP connects and stays connected until the user explicitly logs off.
> > > This is why I also mentioned that ssh (which also uses a persistent tcp
> > > connection) also hangs for like 10 minutes.
> > >
> > > If you don't like the wait, you are free to modify your kernel or submit
> > > a patch to evolution.
> > >
> > > Jeff
> > >
> > > > Scott
> > > >
> > > > On Mon, 2002-11-18 at 12:45, Jeffrey Stedfast wrote:
> > > > > On Mon, 2002-11-18 at 13:50, Scott Otterson wrote:
> > > > > > Yeah, I'd have to agree.  IMAP is _much_ slower -- takes way longer to
> > > > > > start up for the first time and if you disconnect, it's way slower to
> > > > > > reconnect.
> > > > > >
> > > > > > The connection also hangs if my PPP dialup goes down -- I have to run
> > > > > > killev before it can see email again.  This is the only network app I
> > > > > > have that hangs when I loose PPP.
> > > > >
> > > > > I'm guessing you don't run any other apps that use a persistent tcp
> > > > > connection then :-)
> > > > >
> > > > > fyi I am almost always connected to remote sites with ssh and irc, etc
> > > > > and so when my internet connection drops, all those apps hang just as
> > > > > long as Evolution does.
> > > > >
> > > > > Jeff
> > > > >
> > > > > PS: No, netscape/mozilla do not hold persistent tcp connections.
-- 
Scott Otterson <scotto u washington edu>