I have the same problem on 12.04 with Thunderbird 16.0.1. After starting, CPU spikes up to ~60% and stays there for around 20 minutes.
Switching to offline mode immediately stops the problem, switching it back on resumes it, so yes, it is probably email syncing or something related. There is a good amount of emails in my TB (around 10k unread, and probably 50k read) and my .thunderbird folder is around 3GB of size, but I don't think this justifies what happens - probably it is a bug. I have attached my strace log (no gettimeofday calls btw); watch out, it blows up to 70MB when uncompressed. This problem is highly annoying and drains my CPU quickly. Do we have an upstream bug for this? ** Attachment added: "thunderbird strace during high CPU on email sync" https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+attachment/3405629/+files/thunderbird.strace.xz -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/927515 Title: thunderbird uses excessive cpu power Status in “thunderbird” package in Ubuntu: Confirmed Bug description: Just received the automatic update last night. Ever since, thunderbird is using 20-50% CPU constantly, according to top. Turned off global search and indexing to no avail. This is really bad for me as it's driving up the temperature of my laptop, runs up the fan noise and reduces battery time. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: thunderbird 10.0+build1-0ubuntu0.11.10.1 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic x86_64 ApportVersion: 1.23-0ubuntu4 Architecture: amd64 BuildID: 20120129183038 Date: Mon Feb 6 10:44:55 2012 EcryptfsInUse: Yes ProcEnviron: LANGUAGE=nl_NL:nl:en PATH=(custom, user) LANG=nl_NL.UTF-8 SHELL=/bin/bash Profile0Extensions: extensions.sqlite corrupt or missing Profile0Locales: extensions.sqlite corrupt or missing Profile0Plugins: pluginreg.dat isn't available Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile0 - LastVersion=3.0.6/20100713193322 (Out of date) Profile1 (Default) - LastVersion=10.0/20120129183038 (Running) SourcePackage: thunderbird UpgradeStatus: Upgraded to oneiric on 2012-02-02 (4 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
