[Bug 309711] New: Opening folders takes a long time and a couple of thoughts to improve performance.

[Neil]

https://bugs.kde.org/show_bug.cgi?id=309711

            Bug ID: 309711
          Severity: wishlist
           Version: 4.9.2
          Priority: NOR
          Assignee: kdepim-bugs at kde.org
           Summary: Opening folders takes a long time and a couple of
                    thoughts to improve performance.
    Classification: Unclassified
                OS: Linux
          Reporter: hispeed.bz at gmail.com
          Hardware: Other
            Status: UNCONFIRMED
         Component: general
           Product: kmail2

I've been using KDE since the beginning over a decade ago and finally had to
migrate to the kmail/akonadi/nepomuk combo.  The migration itself was a
disaster which I mostly expected after googling around even after delaying
migrating for so long.  I finally got everything mostly working and now kmail
seems to sync folders way to often.

If I click on my Inbox folder with about 13000 messages, it takes a long time
to sync then the message list finally shows up.  If I then click on another
folder and do something else for 10-15 minutes, when I click on Inbox again the
eternal syncing starts again.

I put binlog_format=row in my mysql.conf and i've deleted/rebuit the akonadi
and nepomuk databases more times than I can count.

How about considering:

1. Skipping akonadi/nepomuk for email.  It's great for
calendar/contacts/alarms/etc but for e-mail it just doesn't seem a good fit at
all.  Even searching is easier without slowing things down even more with
nepomuk indexing, and i'm talking about using grep to search mail folders then
using kmail just to read the message.

or

2. Adding a date criteria for syncing so subsequent syncs only sync for new
items since the last sync. 

There's gotta be a way to make kmail2 usable with large mailboxes.  Right now
i'm finding it just barely serviceable.

Reproducible: Always

Steps to Reproduce:
1. Open kmail or kontact and click on mail
2. Click on a folder with thousands (10k) messages
3. Click on another folder
4. Go away for about 15 minutes
5. Click on first folder again

Actual Results:  
Long pause while it syncs

Expected Results:  
Same as previous kmail behaviour, click on a folder and the message list shows
up either immediately or after a couple of seconds.

I'm a big fan of KDE and find it to be a fantastic desktop, but email in this
recent version is a nightmare.   This really needs to be fixed/optimized
somehow because email is one of those show-stopping critical parts of an
operating system.

Seems maybe KDE is getting a little to fancy and adding complexities that are
causing nothing but problems for the vast majority of users (based on the huge
number of results for researching kmail/akonadi/nepomuk problems on google)

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