[Bug 47689] When DirectWrite rendering is enabled in Notepad++ performance is inacceptable

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47689

--- Comment #8 from KOLANICH <kolan_n at mail.ru> ---
>Is it starting with Notepad++ 7.8.8?

Yes.

>With 5.11 you should see some improvement in performance, due to cmap access reimplementation.

I have tested, yeah, there is some improvement ("waves" of redrawing now move
faster), but scrolling is still inacceptably slow :(

>scintilla dwrite backend is poorly optimized itself - it using text layout API, which is meant more for static or rarely updated text, rather than text editors. Basically what happens is that layout object has to be recreated on every text change, and they seem to recreate it even more often.

Could you, please, create an issue in the NPP GitHub repo, and maybe in
Scintilla bug tracker, about it?

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