Re: [Evolution] Significant lag when composing emails

[Ángel <angel 16bits net>]

On 2020-07-28 at 08:17 +0000, André Müller wrote:
> > In the meantime, consider writing in plaintext if possible.
> I tried that and it did not help as intended. However, surprisingly it
> did reveal that the opposite is true. When I am writing in plaintext
> mode, I have this excessive lag: each character being delayed by some
> milliseconds and sometime more. Sometimes it freezes while typing and
> then in a burst all characters come at once. When I am writing in HTML
> mode, everything is fine. No noticeable amount of lag. Again, this
> only happens when having a long "history of quoted emails".
> That is really surprising to me, but that is how it is. I have tried
> with the version coming from the Ubuntu 18.04 repositories as well as
> the flatpak developer version. It is basically the same for both. 


It doesn't seem to fit well with plaintext editing also being affected,
but may be worth a look anyway.

I would suggest to have a close look at the involved signatures, as
those are the parts that will be included continuously (and may be some
of the worst pieces of html in the thread, as well).

My first hypothesis was that perhaps in that long thread there are some
embedded images that the composer might be continuously trying to load
(even if it is failing). It may be valuable to test with evolution in
offline mode, or directly, the network disabled.

Merely in the html field, are there unbalanced tags there? That could
cause some heavy processing (although it's surprising that would be so
noticeable).


Best