[Bug 927515] Re: Thunderbird stuck at 100% CPU

[Alexander List]

I have 2 IMAP accounts configured, and noticed that the CPU hogging /
hanging is definitely related to the number of messages in a mailbox. I
haven't found a lower bound that causes the issue, but mailboxes with
e.g. 20000 or more messages of cronspam were definitely part of the
problem. Removing these messages and/or partitioning them e.g.
chronologically may be a viable workaround.

Testing with "insanely large" mailboxes should definitely be part of
finding the problem ;)

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Title:
  Thunderbird stuck at 100% CPU

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