Question regarding shader performance on MacOS

[schirrmacher]

I implemented this shader with filament: https://www.shadertoy.com/view/Xd2XWR
The performance however is really slow and the animation shutters. I provide the time and resolution to the shader as variables which are update in the animate callback of filament:

    parameters : [
        {
            type : float4,
            name : resolution,
            precision: high
        },
        {
            type : float,
            name : time,
            precision: high
        }
    ],

I would like to know if my implementation is obviously incorrect or how I can pinpoint the performance issue.

Any help how to debug this or how to tackle this is welcome!

This is the filament shader implementation

Expected behavior
Smooth performance comparable to https://www.shadertoy.com/view/Xd2XWR.

Screenshots

Screen.Recording.2024-08-12.at.18.59.33.mov

Desktop:

• OS: MacOS 14.1.1 (23B81)
• Backend: Metal

[schirrmacher]

I identified the issue:

Instead of providing the time as a parameter from the animate callback, one has to use getUserTime().x.