Quoting Joe Besko <[email protected]>:
I've installed Horde Webmail Edition 4.0.3 in a test environment.
I've also noticed that it was taking about 18-20 seconds to go from
one message to the next (with an additional 15-20 seconds for the
sidebar to refresh.)
I thought it was odd that it behaved that way, since my previous
version of Horde Webmail 1.2.5 did not behave this way.
After some searching and some testing, I found that the "poll all
folders" option was the culprit to these long delays. When I turn
off the "poll all folders", IMP and DIMP are very snappy and perform
as I would expect.
Now I have a question, is IMP supposed to poll all folders after
deleting/moving to another message? It seems in the prior version,
we just polled all the folders after we processed the current list
of messages we were viewing.
If you are using the traditional view, and you have the sidebar open,
then yes - this is the intended behavior. Horde 3 loaded the sidebar
in an IFRAME so its refresh rate was independent of what was happening
with the application. Horde 4 now loads the sidebar in a DIV instead,
so it is reloaded every time a page is changed (sidebar data is not
loaded if the sidebar is collapsed).
The dynamic view does not have this problem. It polls only at
whatever interval you configure it to (and is independent from any
message action).
The problem I run into when I don't poll all folders is that I don't
know where the filter has moved new messages outside the inbox.
You should really be using dynamic view then. Traditional
view/sidebar was not designed for performance - dynamic view is.
Although some other issues are at play here also. The base IMAP 4rev1
spec was *NOT* designed with this sort of polling feature in mind and,
in fact, the RFC explicitly discourages it
(http://tools.ietf.org/html/rfc3501#section-6.3.10).
That being said, it is tremendously useful for practical purposes, so
the LIST-STATUS IMAP extension was recently introduced (RFC 5819).
15-20 seconds seems long to poll all mailboxes; my guess you are using
an old IMAP server that doesn't support mailbox caching and/or
LIST-STATUS and an upgrade to an IMAP server that does support this
functionality (e.g. recent versions of Dovecot, Cyrus) will
dramatically improve your performance. We can only do so many tricks
on the MUA side to increase performance. If you truly need real-time
updates of mailbox counts, we can't provide those updates any faster
than the IMAP server gives them.
Also important - you should really rethink using poll ALL mailboxes.
I use filtering, but I filter to a certain subset of mailboxes
(10-12). Unless you are truly using every mailbox in your mailstore
to filter messages into - I highly doubt, for example, you are
filtering incoming messages into things like your Drafts or Sent
mailboxes - you should manually select the mailboxes to poll instead.
michael
___________________________________
Michael Slusarz [[email protected]]
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