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Are constant memory allocations normal?

Discussion in 'Cinemachine' started by frosted, Oct 29, 2021.

  1. frosted

    frosted

    Joined:
    Jan 17, 2014
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    Brain seems to allocate around 1.5k every single frame.

    Is this to be expected or do I have some kind of strange bug ?

    Cinemachine 2.8.0
     
    frosted, Oct 29, 2021
    #1

  2. samochreno

    samochreno

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    Feb 4, 2021
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    Definitely not normal behaviour, at least not from my experience
     
    samochreno, Oct 30, 2021
    #2

  3. frosted

    frosted

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    You sure? Happens in late update, can you check profiler?
     
    frosted, Oct 30, 2021
    #3

  4. frosted

    frosted

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    Jan 17, 2014
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    Alright, so I double checked empty project.

    This is empty project. CM 2.8.0

    Problem starts happening depending on look and follow/body aim.


    Unity_mJMnghIYSV.png
    With default settings but lookat and follow assigned, I get 2.6kb per frame every frame.



    Unity_KLb223uEsb.png
    With LookAt cleared and aim composer not doing anything I get 1.2k with 3rd person follow.



    Unity_N6LUT2MVj2.png
    "Do nothing" for both body and aim, but no LookAt assigned 1.2kb



    Unity_JCwV0O4Rnv.png
    Same "do nothing" but I removed the follow - now finally we have 0kb alloc.
     
    frosted, Oct 30, 2021
    #4

  5. frosted

    frosted

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    Jan 17, 2014
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    alright, so I dug a little deeper...

    this isn't a cinemachine bug its a core unity bug. Unity_cWOQxHGEOy.png
    GetComponent<> will allocate on abstract or interface..... wtf.

    Unity_4S2Y7IlKb4.png

    Are you kidding me?? How tf did this get past QA?! Lol
     
    frosted, Oct 30, 2021
    #5

  6. Gregoryl

    Gregoryl

    Unity Technologies

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    Dec 22, 2016
    Posts:
    7,711
    Actually it is a Cinemachine bug. Don't know how that one got out into the field :eek:, we will fix right away.
    Thanks for letting us know <3

    UPDATE: turns out we had already caught and fixed this. Just update your CM version to 2.8.2.
     
    Last edited: Nov 1, 2021
    Gregoryl, Nov 1, 2021
    #6
    gaborkb and MartinTilo like this.

  7. MartinTilo

    MartinTilo

    Unity Technologies

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    There is an underlying issue underneath that though. The Null Component Error message is not allocated underneath an AvailabilityEditor, aka EditorOnly flagged ProfilerMarker. That is a regression in how well the Profiler is able to hide the allocation that is meaningless to optimize if your only concern is to get your player's game loop GC free.
     
    MartinTilo, Nov 2, 2021
    #7