Performance Optimization - Resource Optimization Notes

Optimization of mesh resources: https://blog.uwa4d.com/archives/LoadingPerformance_Mesh.html
1. The higher the number of mesh faces, the larger the memory footprint, the larger the AB package, the slower the loading
2. The same patch, the more vertex attributes the more loaded.
  Note: When batching, do not merge meshes with different attributes together. One hundred meshes are merged. If 99 have two verticesAttributes, but the 100th has 5 vertex attributes, the engine will complete the first 99 vertex attributes and then batch them together when merging, which will increase memory usage and cause waste
3. The mesh closes Read/Write, which will reduceThe physical size of the AB package is related to the data of the resource itself, which will reduce the memory usage of the mesh resource and improve the loading efficiency
4. Turn off useless attribute import
5.MeshCompression mesh attribute compression
6.IndexFormat: The format of the grid indexing buffer data is 16 bits. This format occupies less memory and bandwidth.
The shader itself does not have much memory, so the loading efficiency bottleneck is not in memory but in content parsing
Reason for time-consuming parsing: The CPU time of shader loading is related to the number of keyworlds, and the more keyworlds, the greater the loading overhead
1. Avoid loading and parsing shaders in non-switching scenes
2. Collect variants in use, reduce the number of ShaderKeyWorlds to improve loading efficiency
3. Directly remove the Fallback option in shaders
4. Optimize the loading method, to avoid repeated analysis caused by repeated addition and uninstallation, and extract the shader file in the project into an independent AB file
 
Texture resource optimization: https://blog.uwa4d.com/archives/LoadingPerformance_Texture.html
Factors that determine texture size: resolution, format, whether Mipmap is turned on
1. The higher the resolution, the slower the loading
2. The higher the format data precision, the slower the loading
3. Turn on the MipmapWill increase the memory size by 1.33 times, strictly check whether the UI resources are closed Mipmap

Animation resource optimization: https://blog.uwa4d.com/archives/Loading_AnimationClip.html
1. Optimize animation accuracy
2. Choose animation compression settings reasonably