gltf loader: do not use the taskpool for only one task

crates/bevy_gltf/src/loader.rs

@@ -247,36 +247,36 @@ async fn load_gltf<'a, 'b>(
  .collect();
 
  // TODO: use the threaded impl on wasm once wasm thread pool doesn't deadlock on it
- #[cfg(target_arch = "wasm32")]
- for gltf_texture in gltf.textures() {
- let (texture, label) =
- load_texture(gltf_texture, &buffer_data, &linear_textures, &load_context).await?;
- load_context.set_labeled_asset(&label, LoadedAsset::new(texture));
- }
-
- #[cfg(not(target_arch = "wasm32"))]
- load_context
- .task_pool()
- .scope(|scope| {
- gltf.textures().for_each(|gltf_texture| {
- let linear_textures = &linear_textures;
- let load_context: &LoadContext = load_context;
- let buffer_data = &buffer_data;
- scope.spawn(async move {
- load_texture(gltf_texture, buffer_data, linear_textures, load_context).await
+ if gltf.textures().len() == 1 || cfg!(target_arch = "wasm32") {
+  for gltf_texture in gltf.textures() {
+  let (texture, label) =
+  load_texture(gltf_texture, &buffer_data, &linear_textures, &load_context).await?;
+  load_context.set_labeled_asset(&label, LoadedAsset::new(texture));
+  }
+ } else {
+  load_context
+  .task_pool()
+  .scope(|scope| {
+  gltf.textures().for_each(|gltf_texture| {
+  let linear_textures = &linear_textures;
+  let load_context: &LoadContext = load_context;
+  let buffer_data = &buffer_data;
+  scope.spawn(async move {
+  load_texture(gltf_texture, buffer_data, linear_textures, load_context).await
+ });
  });
+ })
+ .into_iter()
+ .filter_map(|res| {
+ if let Err(err) = res.as_ref() {
+ warn!("Error loading glTF texture: {}", err);
+ }
+ res.ok()
+ })
+ .for_each(|(texture, label)| {
+ load_context.set_labeled_asset(&label, LoadedAsset::new(texture));
  });
- })
- .into_iter()
- .filter_map(|res| {
- if let Err(err) = res.as_ref() {
- warn!("Error loading glTF texture: {}", err);
- }
- res.ok()
- })
- .for_each(|(texture, label)| {
- load_context.set_labeled_asset(&label, LoadedAsset::new(texture));
- });
+ }
 
  let mut scenes = vec![];
  let mut named_scenes = HashMap::default();