Bug (IN-50800) HUGE performance degradation caused by one of 2D Features package

To reproduce:
1) Create empty 2D project.
2) Ensure that com.unity.2d.aseprite@1.0.0 is installed in project
3) Add and use this script (this may take a while):

Code (CSharp):

1.  
2. using System.IO;
3. using UnityEditor;
4. using UnityEngine;
5.  
6. public class PNGGeneratorEditor
7. {
8.     [MenuItem("Tools/Generate PNGs")]
9.     static void GeneratePNGs()
10.     {
11.         int totalFiles = 5500;
12.         string savePath = Path.Combine(Application.dataPath, "GeneratedPNGs");
13.         if (!Directory.Exists(savePath))
14.         {
15.             Directory.CreateDirectory(savePath);
16.         }
17.  
18.         for (int i = 0; i < totalFiles; i++)
19.         {
20.             Texture2D texture = new Texture2D(256, 256, TextureFormat.RGBA32, false);
21.  
22.  
23.             for (int x = 0; x < texture.width; x++)
24.             {
25.                 for (int y = 0; y < texture.height; y++)
26.                 {
27.                     Color color = new Color(Random.value, Random.value, Random.value);
28.                     texture.SetPixel(x, y, color);
29.                 }
30.             }
31.  
32.             texture.Apply();
33.  
34.  
35.             byte[] bytes = texture.EncodeToPNG();
36.             string fileName = $"image_{i}.png";
37.             File.WriteAllBytes(Path.Combine(savePath, fileName), bytes);
38.  
39.             Object.DestroyImmediate(texture);
40.         }
41.  
42.         AssetDatabase.Refresh();
43.  
44.     }
45. }
46.  

4) Go to Task Manager to see huge CPU usage while Editor is idle (it's depends but for me it is one whole core) While profiler will not show any abnormality.
5) Delete com.unity.2d.aseprite package from project.
6) Notice that CPU usage is back to normal.
Tested on Unity 2022.3.6f1 but can i belive that all versions that use com.unity.2d.aseprite@1.0.0 are affected.
5500 PNG files are a lot, but certainly many projects have more
Notice that even this is issue with aseprite importer project not need contain such a file to be affected.

This is especially problematic because com.unity.2d.aseprite is part of the 2D Features meta package.
So it affects many users who don't even use this file format.
I don't understand why such a specific package is automatically installed.

 

It's much better, but I still see a minor impact on CPU usage on idle compared to not installing the package

 

I also came across this bug when upgrading from Unity 2022.2 to 2022.3 and also created a bug report. It is good to hear that it is fixed now.

But what I really don't understand why Unity putting so much optional packes forcefully into our projects. You have to opt-out, because they are installed by default. I learned that more packages means more troubles in our projects. And this one caused by the Aseprite Importer is a prime example. Really bad practice by Unity.