Since I upgraded to SyncEvolution 1.5, synchronizing my calendar (in two-way
mode) with my CalDAV server (Radicale) generates an abnormally high amount of
network traffic.

This is the corresponding entry in my apache log:

2001:7a8:3d80:0:a00:27ff:fe70:ffdd - - [16/Nov/2014:00:23:09 +0100] "REPORT
/sebastien/calendar.ics/ HTTP/1.1" 207 26684196 "-" "SyncEvolution"

As you can see, this simple two-way synchronization consumes 26Mb, while the
ics file of the calendar is 300kb.

This is of course highly inefficient, and also makes SyncEvolution almost
unusable to me, because synchronization now takes 6 minutes (due to low upload
bandwith of my server).

SyncEvolution 1.4 was much more efficient in this respect, and was doing the
synchronization in a couple of seconds.

Any idea how to fix this? Is there a simple workaround that I could apply?

Thanks for creating SyncEvolution.