add spans when recursively despawning an entity

crates/bevy_hierarchy/src/hierarchy.rs

@@ -56,12 +56,28 @@ fn despawn_children(world: &mut World, entity: Entity) {
 
 impl Command for DespawnRecursive {
     fn write(self, world: &mut World) {
+        #[cfg(feature = "trace")]
+        let span = bevy_utils::tracing::info_span!(
+            "command",
+            name = "DespawnRecursive",
+            entity = bevy_utils::tracing::field::debug(self.entity)
+        );
+        #[cfg(feature = "trace")]
+        let _guard = span.enter();
         despawn_with_children_recursive(world, self.entity);
     }
 }
 
 impl Command for DespawnChildrenRecursive {
     fn write(self, world: &mut World) {
+        #[cfg(feature = "trace")]
+        let span = bevy_utils::tracing::info_span!(
+            "command",
+            name = "DespawnChildrenRecursive",
+            entity = bevy_utils::tracing::field::debug(self.entity)
+        );
+        #[cfg(feature = "trace")]
+        let _guard = span.enter();
         despawn_children(world, self.entity);
     }
 }
@@ -92,6 +108,15 @@ impl<'w> DespawnRecursiveExt for EntityMut<'w> {
     /// Despawns the provided entity and its children.
     fn despawn_recursive(mut self) {
         let entity = self.id();
+
+        #[cfg(feature = "trace")]
+        let span = bevy_utils::tracing::info_span!(
+            "despawn_recursive",
+            entity = bevy_utils::tracing::field::debug(entity)
+        );
+        #[cfg(feature = "trace")]
+        let _guard = span.enter();
+
         // SAFE: EntityMut is consumed so even though the location is no longer
         // valid, it cannot be accessed again with the invalid location.
         unsafe {
@@ -101,6 +126,15 @@ impl<'w> DespawnRecursiveExt for EntityMut<'w> {
 
     fn despawn_descendants(&mut self) {
         let entity = self.id();
+
+        #[cfg(feature = "trace")]
+        let span = bevy_utils::tracing::info_span!(
+            "despawn_descendants",
+            entity = bevy_utils::tracing::field::debug(entity)
+        );
+        #[cfg(feature = "trace")]
+        let _guard = span.enter();
+
         // SAFE: The location is updated.
         unsafe {
             despawn_children(self.world_mut(), entity);

crates/bevy_internal/Cargo.toml

@@ -10,7 +10,14 @@ keywords = ["game", "engine", "gamedev", "graphics", "bevy"]
 categories = ["game-engines", "graphics", "gui", "rendering"]
 
 [features]
-trace = [ "bevy_app/trace", "bevy_ecs/trace", "bevy_log/trace", "bevy_render/trace", "bevy_core_pipeline/trace" ]
+trace = [
+    "bevy_app/trace",
+    "bevy_core_pipeline/trace",
+    "bevy_ecs/trace",
+    "bevy_log/trace",
+    "bevy_render/trace",
+    "bevy_transform/trace"
+]
 trace_chrome = [ "bevy_log/tracing-chrome" ]
 trace_tracy = [ "bevy_log/tracing-tracy" ]
 wgpu_trace = ["bevy_render/wgpu_trace"]

crates/bevy_transform/Cargo.toml

@@ -8,6 +8,9 @@ repository = "https://github.com/bevyengine/bevy"
 license = "MIT OR Apache-2.0"
 keywords = ["bevy"]
 
+[features]
+trace = []
+
 [dependencies]
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.7.0-dev" }