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Fixed in 2019.2

Duplicate in 2018.3

Fixed in 2018.3, 2019.1



Found in





Issue ID




[VR]EarlyUpdate.XRUpdate's CPU usage increases by about 2.4ms every 10minutes if the Unity Player isn't focused on



Steps to reproduce:

1. Create a new project
2. Enable VR
3. Build for standalone with "Development Build" and "Auto-Connect Profiler"
4. Run the build with an HMD attached
5. Open the profiler window
6. Make sure it is connected to the player
7. Leave the player running while unfocused for at least 20 minutes

Result: CPU usage spikes start occurring, player becomes laggy and continues to become worse as time goes on

Reproduced on 2017.4.0f1, 2017.4.17f1 2018.3.1f1, 2019.1.0a13

  1. Response avatar

    Resolution Note (fix version 2019.2):

    Fixed in 2018.3.10f1

Comments (31)

  1. 8a9a1c5c5caf99dc6fa8408ce78de139?d=mm


    Feb 15, 2019 13:45

    I've also replicated the issue from 2018.2.0 onwards, independent of Oculus or SteamVR HMD's.

    Fix urgently needed, as we tend to run without exe focus often as well!

  2. 4c418c6664e24157d57c24145fd58f45?d=mm


    Jan 29, 2019 13:27

    I'm experiencing this issue too. Please fix. :)

  3. B638acd2eda6ebe691866643956dc46c?d=mm


    Jan 28, 2019 18:26

    also encountering this issue in 2018.2.14f1

  4. 3ae66188b7f6e4354884def916fd7629?d=mm


    Jan 25, 2019 20:33

    I was unable to reproduce this in 2018.1.1 and 2018.1.9, but did reproduce in 2018.2.0, so it seems like it was introduced in 2018.2

  5. 2bd7c7333f22b88433ddffb535d7c3eb?d=mm


    Jan 23, 2019 06:16

    Most of the system may not support the upgraded version as these may not compatible with the system version. To resolve these issues may contact with that will guide them to overcome these situations.

  6. 3ae66188b7f6e4354884def916fd7629?d=mm


    Jan 19, 2019 09:05

    I am also getting this problem, setting executable focus back to our app eliminates the lag but it is not a good solution.

  7. D357dc85babdbbb7eda132e04168f93f?d=mm


    Jan 17, 2019 12:36

    This is a bad bug for our kind of application (Enterprise VR where we often have a VR client and a normal client with GUI running on the same PC, so the VR client isn't focused.

    We have found these repro steps also happen in 2018.3.2f1 and 2018.2.19f1

    Hope it gets fixed soon

  8. 79bb7ee39d48a57dbe8eb15d9552b90a?d=mm


    Jan 09, 2019 10:37


  9. 3229787dc49c9f4196bd2f2c45112124?d=mm


    Jan 08, 2019 07:52

    This problem must be a show stopper for some kind of games.

  10. 301c2854904fdb3c4406d60470f9f8c5?d=mm


    Jan 08, 2019 06:38

    Please fix this!

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