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Fixed in 2019.2.X

Duplicate in 2018.3.X

Fixed in 2018.3.X, 2019.1.X



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. Resolution Note (fix version 2019.2):

    Fixed in 2018.3.10f1

Comments (32)

  1. jhonhillpizza

    Mar 23, 2022 05:39

    I’m happy by reading your enjoyable article, Keep uploading more interesting articles like this.

  2. Olivia2727

    Mar 23, 2022 05:34

  3. Vongsomxai

    Nov 09, 2020 05:28

    This still happening... now it gets worst. It constantly 3~5 ms all the time. Please fix it

  4. mercygaleria

    Jul 28, 2020 09:59;u=245304;u=19154;u=556429;;u=245305;;u=19155;u=556432;;u=556433;u=245302;;u=556434,,,,

  5. NewMagic-Studio

    Nov 24, 2019 19:40

    I am using 2019.2 and i get EarlyUpdate.XRUpdate use most of my CPU even in just empty projects. When i create an empty project works fine, but not in my project dont know why

  6. vrbugstream

    Mar 20, 2019 12:19

    My CPU hits 100% now. As a streamer I cannot have the game window always focused and I see the CPU increase on Unity games to the point that it destroys the frame rate in the HMD. I had to stop my stream today because of this issue. Please fix.

  7. raithza

    Mar 13, 2019 07:46

  8. raithza

    Mar 12, 2019 14:03

    This is an absolutely gamebreaking bug for us and people are giving us negative steam reviews & refunds because of this. PLEASE can we get this fix in 2018.3? Upgrading to 2018.3 has already probably cost us about a month of development time, we can't afford to do another full version upgrade.

  9. Carpet_Head

    Mar 12, 2019 11:35

    Another request for backport

  10. t-kuhn

    Mar 04, 2019 01:49

    Please backport this fix to 2018.3. We really need this to be fixed for our application to work as intended.

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