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Duplicate in 2019.3.X



Found in



Issue ID




AssetDatabase.Refresh() executes slower when compared to previous versions

Asset Import Pipeline


How to reproduce:
1. Open the attached project("AssetImportPerformance")
2. Go to BugReport > Create 100 assets
3. Observe console

Expected result: AssetDatabase.Refresh takes around the same amount of time regardless of Unity versions
Actual result: AssetDatabase.Refresh takes more time than in previous versions

Reproducible with: 2019.3.0a1, 2019.3.0a11
Not reproducible with: 2017.4.30f1, 2018.4.5f1, 2019.1.12f1, 2019.2.0b10

- It seems to reproduce only on HDD hard drives. Storing project in SSD hard drive results in expected behaviour even in 2019.3.0a1 and above.

Comments (18)

  1. 5bd1f8e67ffc4a75a8f0a38e70e2f1e4?d=mm


    Aug 18, 2021 04:31

    already try everything on 2019.4.29f1 LTS and every time i hit CTRL + S after making some changes to a public variable in the inspector the project refreshes two times and the second time takes like 6 to 8 seconds i dont understand and i think that my computer would run any unity version im using SSD'S + 48GB RAM DDR4 and GTX 1060 6GB GPU.

  2. A9bb785f1094d9c4dfb95c072c7b55fb?d=mm


    May 30, 2021 01:06

    Not fixed!! Same result using 2020.3.3f1 and 2021.1.9f1

  3. Cc123aad54f1c4511e8c63b2f75c3be6?d=mm


    Apr 06, 2021 12:07

    I had this very annoying issue on 2020.1 which was resolved after migrating the project to 2020.3.

  4. Cd8af32566997cefffa96322e0d6698d?d=mm


    Apr 05, 2021 13:02

    Not a duplicate issue and not fixed..

  5. 8781230776721d80a562fef4dab481c1?d=mm


    Mar 30, 2021 22:49

    This problem still exists

  6. 426efb53ec14d9ce7a20dc73f81e085b?d=mm


    Jan 10, 2021 22:22

    I get the same issues and it's not fixed nor getting any better. I am always loading up projects in 2018, 2019, and 2020 and only 2020 is doing this. Grant you I'm on 2020.2.1f1 now but it seems I save a file, import a texture, or move a file from one location to another and it triggers this which can take up to 90 seconds. I'm going back to 2019 until someone from Unity actually fixes this.

  7. 60c58785cd3fe296c7077338359db95f?d=mm


    Nov 19, 2020 04:21

    Still happening each and everytime there is a code change.

  8. B581319d8cbdff7c3d3acc33c660f051?d=mm


    Oct 18, 2020 11:01

    Same here in 2020.1 . Almost 1 minute to save any script or run the game.

  9. C900f5b6714a6579df2d6091507c373a?d=mm


    Sep 14, 2020 20:03

    I am still having this issue, every time I make a tiny change in VS it takes a few seconds to get back to editor.

  10. 05fa7ab33c4800b66625d20cd3b71e4b?d=mm


    Aug 30, 2020 21:09

    I'm having the same issue with 2020.1.3f1

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