The Sprite Atlas Analyzer's "Atlas Page Count > 1" and "Textures contain different secondary texture count in Sprite Atlas" entries load slowly when analyzing large Sprite Atlases

How to reproduce:

1. Open the attached “IN-147212” project
2. Open the Sprite Atlas Analyzer window (Window → Analysis → Sprite Atlas Analyzer)
3. Press the “Analyze” button
4. Observe the “Atlas Page Count > 1” and “Textures contain different secondary texture count in Sprite Atlas” entries

Actual result: Both entries display “…” for several minutes
Expected result: Both entries are populated with values within a few seconds

Reproducible with: 1.0.1 (6000.3.0a2), 1.0.3 (6000.3.19f1), 3.0.0 (6000.5.0b12)
Partially not reproducible with: 1.0.0 (6000.3.0a2) (see note)
Partially fixed in: 3.0.1 (6000.5.0b12, 6000.5.2f1, 6000.6.0a2) (see note)
Could not test with: 6000.0.79f1 (2D Tooling was introduced in 6000.3), 3.0.1 (6000.6.0a3, 6000.6.0a7), 4.0.0 (6000.6.0a1, 6000.7.0a2) (The faulty entries are evaluated quickly, but all Sprite Atlases return a sprite count of 0, making the results unreliable)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:

• In 2D Tooling 1.0.0 and 3.0.1, “Atlas Page Count > 1” is populated immediately, while “Textures contain different secondary texture count in Sprite Atlas” remains slow across every package version
• If all entries are populated immediately, and the “Atlas Page Count > 1” and “Textures contain different secondary texture count in Sprite Atlas” entries both have values of 0, perform the following steps:
  1. In the Project window, enter “t:spriteatlas” in the search field
  2. Select one of the listed Sprite Atlases
  3. In the Inspector, select “Pack Preview”
  4. Repeat for the remaining Sprite Atlases shown in the Project window
  5. You may also need to clear the Sprite Atlas Analyzer Data (next to the “Analyze” button, press … → Clear Data)
  6. Perform the reproduction steps again