[horde] Heavy server load regenerating sidebar

[Jānis]

Hi!

I observe heavy server load regenerating side bar (menu, horde 4.0.12)  
- on my server it takes about 10-15 sec on that operation.

It can be observer at the very beginning of the session what after  
login there is the delay of 10-15 secs, and every time the side bar  
(side menu) is exploded. As well - on any operation if the side menu  
is shown.

How that can be optimized? Before, on Horde 4.0.10 there was no such delay...

Janis