Reproduction steps:
1. Open the attached project "AddressablesPerformanceTest.zip"
2. Open "SampleScene"
3. Select the "Test" GameObject in the Hierarchy window
4. Observe Test Array size (5000 AssetReferences)
5. Trigger Domain Reload (for example, reimport Test.cs in the Project window)
6. Change the Test Array size to 25000
7. Observe Unity not responding and wait for it to become responsive
8. Trigger Domain Reload

Expected result: Domain Reload takes the same amount of time regardless of Array size
Actual result: Changing the Array size will cause Unity to stop responding, Domain Reload will be longer the second time (~11 s) than the first (~3 s)

Reproducible with: 1.17.5-preview (2019.4.33f1, 2020.3.24f1, 2021.2.5f1, 2022.1.0b1), 1.19.13 (2019.4.33f1, 2020.3.24f1, 2021.2.5f1, 2022.1.0b1)
Not reproducible with: 1.17.4-preview (2019.4.33f1, 2020.3.24f1, 2021.2.5f1, 2022.1.0b1)

Note: The AssetReferences do not reference assets