Performance of ScreenLoader.Append in BabylonNative (Android)

Questions
1

I am using SceneLoader.Append to load a gltf file exported from Blender. The file is 628Kb and includes some animations.

I am comparing BabylonNative on Android with BabylonJS in an Android Webview. It takes over 30 seconds to load in BN and under 2 seconds in BJS. By “load” I mean from the Append call until the onSuccess callback is invoked.

Based on this forum post, I tried setting scene.blockMaterialDirtyMechanism = true, and that reduced the load time in BN to about 20 seconds.

Is there something else going on here? Is this expected at this point?

Thanks

2

Are you running in debug or release? Do you have any textures in the gltf file?

3

Debug. Yes, most of the file is base64 texture data.

I’ve tried both loading the gltf from a file in the app assets and downloading it from a local server.

4

Debug is going to be quite slow because mipmap generation is rather slow in debug. Can you try release and see if it’s better?

5

Yes. It takes 3-4 seconds in the release build.

Is there a way to disable something to speed up the debug build?

6

If you hard code this line to false, then it will be faster, but you won’t get mipmaps. Hopefully, that’s not going to affect the scenario too much.