Matthew Lear <matt@bubblegen.co.uk> writes:

> Here's two attachments obtained using the in-built profiler in emacs 24 -
> one for memory profiling and one for cpu. This particular thread took > 30
> secs to load and emacs was locked up the entire time. I'm no lisp expert,
> but perhaps somebody could interpret this and possible suggest what could
> be going on..? W.r.t. both cpu and memory usage, quite a lot of time seems
> to be spent in indent-rigidly and notmuch-show-insert-thread.
>

That's consistent with what I've seen with very large text attachements.
Can you try the patch

    id:1427540939-10055-1-git-send-email-markwalters1009@gmail.com [1]

[1] http://mid.gmane.org/1427540939-10055-1-git-send-email-markwalters1009@gmail.com