emacs slow with large threads

Brian Sniffen bts at evenmere.org
Fri Jan 18 16:27:07 PST 2019

This is much worse than normal problems with large files or long lines. There’s something worse-than-quadratic in the nesting and indenting elisp. I’ve been meaning to get around to figuring out what, but no luck yet. 

Brian Sniffen

> On Jan 18, 2019, at 7:03 PM, Landry, Walter <wlandry at caltech.edu> wrote:
> 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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