Description of the Issue

When using a root directory with > 40000 files, > 2000 directories (~9.5GB) in FAW, Npp freezes on my machine for ~10 seconds for each action executed in the Style Configuration dialog like changing the language or changing style attributes.

Steps to Reproduce the Issue

1. Open FAW
2. add a directory with many files and folders
3. open style configurator
4. change to another language

Expected Behavior

Instant update of the style attributes of the selected language

Actual Behavior

Npp freezes

Debug Information

Notepad++ v8.4.6 (64-bit)
Build time : Sep 25 2022 - 19:51:39
Path : D:\Tests\npp\846\x64_2\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 10 Pro (64-bit)
OS Version : 21H2
OS Build : 19044.1889
Current ANSI codepage : 1252
Plugins : none