emacs slow with large threads

Dan Čermák dan.cermak at posteo.net
Fri Jan 18 16:11:20 PST 2019

Hi Landry,

I am afraid this is a common limitation of emacs: if you start opening
large files (especially with long lines) it becomes very slow.

A viable workaround is to open the offending thread in the tree view
(bound to 'z' by default) and then only view individual messages.



"Landry, Walter" <wlandry at caltech.edu> writes:

> Hello Everyone,
> I am using the emacs frontend to notmuch.  It has mostly been a pleasant
> experience, but I am having a problem with large threads.  Essentially,
> when I try to view a large thread, the machine locks up for many
> minutes.  The problem seems very similar to these posts.
>   https://notmuchmail.org/pipermail/notmuch/2013/014811.html
>   https://notmuchmail.org/pipermail/notmuch/2015/020379.html
> I tried turning off html rendering by setting mm-text-html-renderer to
> nil.  That helped, but it is still taking at least 10 minutes to render
> a thread.  I killed it when I ran out of patience.
> The thread has 231 messages, and running
>   notmuch show thread:000000000000d637 | wc -l
> shows that it is 46918 lines long.  Running that on the command line is
> fast, taking 0.123 seconds.  As a comparison, I tried opening the thread
> with astroid.  It was not instantaneous, but it only took about 3
> seconds.
> I am guessing that the emacs mode is trying to process the result.  I
> can work around this a bit by opening individual messages with "C-u RET"
> instead of "RET".  But then I lose context.
> Is there anything else I can do to make this work?
> Thanks,
> Walter Landry
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