Should have checked the Mozilla bug tacker first :-). This bug seems to be a known issue: https://bugzilla.mozilla.org/show_bug.cgi?id=733039.
After cleaning up the cache as suggested in the thread as a workaround, performance is back to normal. ** Bug watch added: Mozilla Bugzilla #733039 https://bugzilla.mozilla.org/show_bug.cgi?id=733039 ** Also affects: thunderbird via https://bugzilla.mozilla.org/show_bug.cgi?id=733039 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1458593 Title: Super-slow startup and sluggish performance when using the GCAL provider To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1458593/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
