This is most obvious in Mail and Contact, although when I tried to delete a couple of old To-do entries, the warning was flagged, but they weren't removed from the pane for some time. In Mail, I get the message 'Retrieving Folder Contents' for 10 minutes or more when I click on a mail item. Eventually, I can read the item, but it still shows as 'New' for another 10 minutes or so. While waiting, I can read the tool tip. In Contacts, I get a similar issue when I click on a contact name, although there is no tool tip visible. If I try to edit the contact, all the fields are blank. Calendar and Pop-up Notes seem to work normally. Reproducible: Always Steps to Reproduce: 1. See details. 2. 3. Actual Results: See details. Expected Results: Display the mail message / contact. My computer is using an AMD Athlon(tm) 64 X2 Dual Core Processor 4400+. I have 4 Gb of RAM of which 1. 5 Gb is used for applications, with most of the rest being cache space. I am running Kubuntu 13.10, although I noticed this problem before the update from 13.04, but it was not particularly an issue then. I tried turning off Desktop search, which reduced the CPU usage by a considerable amount, but has not solved the problem.
I have now confirmed this fault to my own satisfaction; I have stopped using Kontact and am using Thunderbird instead. Not only is the performance just as it should be, but more to the point; CPU usage has dropped from 90-100% (on both cores of an AMD Athlon) to less than 10% on both cores when the desktop is idle. Much of the time one core shows 0%.
Ok you use thunderbird. So not necessary to lose time to track/fix your bug I close it
That is a most unhelpful response. I do not use Thunderbird, I use Kontact. I only switched to it because I needed an email client and there has been no response on this bug list since I posted the original report nearly a week ago. As it was I had nothing usable. My point was that there was clearly a problem: I would have preferred to return to using Kontact when this bug is fixed, however, if you do not wish to follow this up; that is your prerogative. I'll have to stay with Thunderbird or find something better.