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Duplicate in 2019.3



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 (12)

  1. 60c58785cd3fe296c7077338359db95f?d=mm


    Nov 19, 2020 04:21

    Still happening each and everytime there is a code change.

  2. B581319d8cbdff7c3d3acc33c660f051?d=mm


    Oct 18, 2020 11:01

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

  3. 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.

  4. 05fa7ab33c4800b66625d20cd3b71e4b?d=mm


    Aug 30, 2020 21:09

    I'm having the same issue with 2020.1.3f1

  5. F4b7a96a8cb16a3612c2239aa6ceb29d?d=mm


    Aug 28, 2020 22:31

    Yeah this is insane. 10x Slower than 2019 and I cant revert my project.

  6. 426181fcc4e908199e9baf658f5414ed?d=mm


    Aug 20, 2020 07:39

    I'm experiencing this issue in 2020.1.0f1 too - slows me down a lot. Will this bug be reopened or is there already a follow up ticket so that we can track the status of this issue?

  7. 16a5eec5eca4550033c0e19dba3b32b8?d=mm


    Aug 16, 2020 19:18

    Also still having this issue in 2020.1.2f1 ... it's infuriating how this locks up the editor for such a long time. I'm almost tempted to just downgrade everything to an ancient version just to avoid this.

  8. F2604442f0023acff6d5d37431c6e021?d=mm


    Aug 03, 2020 14:27

    Using version 2020.1 and having this issue. Importing anything or changing a script locks up Unity for a long time.

  9. D2fe0be3c4935fc1f402c425944c907e?d=mm


    Jul 27, 2020 00:54

    How is this a duplicate? This hasn't been fixed in 2020.1!

  10. 23a866368e38d8b385d42991611c8efb?d=mm


    Jul 25, 2020 02:33

    Unity 2020.1 still having this issue

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