[Bug 927515] Re: thunderbird uses excessive cpu power

[nh2]

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

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Title:
  thunderbird uses excessive cpu power

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