Search Unity

Feature Request Only pay performance for features actually use

Discussion in 'Graphics Dev Blitz Day 2023 - Q&A' started by optimise, May 24, 2023.

  1. optimise

    optimise

    Joined:
    Jan 22, 2014
    Posts:
    2,129
    I would like official to make both urp and hdrp to only pay performance for the features that actually use meaning there's the features list windows to toggle on/off. When toggle off it will exclude from the RenderPipelineManager update loop. Currently it seems like by default at URP, it already takes around 4ms+ at Android mobile platform with just insanely simple scene only has a plane and a cube which is insanely slow. And also since render graph coming to URP, I hope official will enable this feature list toggle window.
     
    Last edited: May 24, 2023
    optimise, May 24, 2023
    #1
    bart_the_13th, Unifikation, NotaNaN and 1 other person like this.

  2. optimise

    optimise

    Joined:
    Jan 22, 2014
    Posts:
    2,129
    Bump
     
    optimise, May 25, 2023
    #2

  3. SebLagarde

    SebLagarde

    Unity Technologies

    Joined:
    Dec 30, 2015
    Posts:
    934
    Hi, answering for HDRP. Given Unity is a generic engine with multiple differents need, it is difficult to find the right balance between shader variants and available features.
    Being able to disable every features individually may require to do a lot of shader variation and thus increasing shader compilation time (or anoying wait for shader to compile in editor). This is the main reasons why there is some default cost.
     
    SebLagarde, May 26, 2023
    #3

  4. optimise

    optimise

    Joined:
    Jan 22, 2014
    Posts:
    2,129
    Is that possible to utilize burst to speed up shader compilation time?
     
    optimise, May 26, 2023
    #4

  5. SebLagarde

    SebLagarde

    Unity Technologies

    Joined:
    Dec 30, 2015
    Posts:
    934
    Nope, the current bottleneck is indide the shader compilation itself (i.e FXC) - there is various discussion in other threads about to try to reduce shader variances.
     
    SebLagarde, May 30, 2023
    #5
    optimise likes this.