Slow writing replay on big email

I just upgraded to v1.9 and works better, but still is hard to write email replay when is very long (>200 lines)
this is video from real time writing:

also insert text with 3 words take up to few seconds
Browser is chromium

I don’t have problem on eg. SOGo webmail.

Hi,

I’ve not experienced that myself. Is your browser busy? Does it cause high CPU load when the slow typing happens?

We use CKEditor as editor component. Do you also experience slow editing at CKEditor 5 demo - A set of ready to use rich text editors created with a powerful framework?