Improve editor performance when spam-pasting

[Palloxin]

Check for existing issues

• Completed

Describe the feature

Spam-pasting lags, and the text I used wasnt even that long:

01234567890 - 1234567890 - 1234567890 - 1234567890 - 1234567890

YouCut_dd.mp4

I wish for it to be as smooth as QuickEdit ↓

If applicable, add mockups / screenshots to help present your vision of the feature

YouCut_202djdjd.mp4

[Palloxin]

Not really about spamming, here I take it slow, and it is even worse

not.rjj.mp4

[Palloxin]

here you go

[Palloxin]

Oh I forgot to say I did all this on an unsaved/temporary file.

Edit, halpens on saved ones too

[AuDevTist1C]

Similar issue, as in inserting* or deleting large cumulative amount of text

*in any way, whether by typing or by pasting