Dear Maintainer,

I've connected an IMAP-account with SSL (Port 993) and the calendar (iceowl)
with a SSL-caldav-calendar from the company. When I start icedove one core of
my CPU (i7-620m) is at 100% for about one minute. In this time icedove is
almost unusable. When I disable iceowl everything runs fine, on the other hand,
when only iceowl is using the calendar and no email-account is configured
everything is fine too. I only found an older bugreport for the same problem
but it seems to be fixed, maybe it's a similiar issue.

https://bugzilla.redhat.com/show_bug.cgi?id=488066

Unfortunaly I'm only allowed to use connections with SSL so I can't test if
this is also happening without any encryption.

Hello Hendrik,

we usaly don't prefer not encrypted transport security so with enabled
TLS traffic all needs to work the same as without.

I can't reproduce such a behavior here, ist this issue still alive on
your side?
If so maybe you want to start thunderbird from the comman line to see
some moer output.

Regards
Carsten

Hi Carsten,

meanwhile I'm using a newer version of Thunderbird, I've updated Debian
from Jessie to Stretch and I'm using newer, more powerful hardware. So
there is still a high CPU-usage while starting up Thunderbird, but it's
about 10-15 seconds and not for a minute.
I can test starting Thunderbird from a command line when I'm back at my
Office-PC.

Hendrik

Am 20.05.2017 um 10:00 schrieb Carsten Schoenert:

Hello Hendrik,

this sound like you are using calendar-google-provider. If you disable
this extension and restart you see a significant quicker starting of
Thunderbird.

The delay with the c-g-p is related to the real time communication with
Google servers while syncing calenders and task. This is more a upstream
issue.
You will see more if you start Thunderbird from a terminal.

Regards
Carsten