新版速度较慢

新版 v25.09 在编辑文字时存在输入延迟问题，打字速度较快时，文字上屏响应明显滞后，影响输入流畅性。相比之下，似乎 v25.06 及更早版本在相同操作下表现顺畅，未出现显著卡顿。
这可能与关键字提示功能有关，因为在输入较长且无规律的文本时，并未出现明显的卡顿现象。

注： 我的文件为500行以内的python脚本文件

补充说明：代码编辑过程中，初期操作是流畅的，但编辑一段时间后开始出现卡顿现象。经测试，在空白行输入“for”后，连续使用三次退格键将其删除，重复此操作约十几次后，编辑器响应明显变慢，出现卡顿。该现象可能与编辑器的语法高亮、自动补全或文本渲染机制在持续编辑过程中积累的资源消耗有关。

[zufuliu]

Is app smooth after disable "Undo Redo Remember Selection"?

Thanks for your answer. After testing, disabling "Undo Redo Remember Selection" did not significantly improve the smoothness. What is certain is that v25.06 is smooth.

[zufuliu]

Which version (zip) do you use? is v25.07 smooth? you can clone the code and bisect to first bad commit.
If you don't have Visual Studio, build with llvm-mingw (https://github.com/mstorsjo/llvm-mingw/releases) is easy.

I'm using Notepad4_HD_i18n_x64_vXXXX.zip. There doesn't seem to be any noticeable difference between the v25.07and v25.09. I'm still unsure of the cause of the lag. Thanks for your answer, maybe I'll find the cause after some time.

I used Github Actions to build the commit. The App built with commit 829aa09(Release v25.06r5696) ran smoothly, but the next commit, 8fb2e5d(Merge branch 'main' into develop), did not run smoothly. The file I tested was Notepad4_MSVC2022_i18n_x64.zip

[zufuliu]

That's a big change (related to issue #974): upgrade Scintilla 5.5.4 to 5.5.7, then you can bisect on develop branch from v25.05.

Many thanks!

Following the discussion in issue 974, I switched "Direct2D" to "Legacy GDI" and the issue was resolved. Thanks again.

[zufuliu]

Following the discussion in issue 974, I switched "Direct2D" to "Legacy GDI" and the issue was resolved.

Then duplicate of issue #765.