Add note on AssetServer::load not being wasteful

crates/bevy_asset/src/lib.rs

@@ -18,7 +18,9 @@
 //!
 //! The [`AssetServer`] is the main entry point for loading assets.
 //! Typically, you'll use the [`AssetServer::load`] method to load an asset from disk, which returns a [`Handle`].
-//! This handle will be used to instantiate various [`Component`](bevy_ecs::prelude::Component)s that require asset data to function,
+//! Note that this method does not attempt to reload the asset if it has already been loaded: as long as the asset hasn't been dropped,
+//! calling [`AssetServer::load`] on the same path will return the same handle.
+//! The handle that's returned will be used to instantiate various [`Component`](bevy_ecs::prelude::Component)s that require asset data to function,
 //! which will then be spawned into the world as part of an entity.
 //!
 //! If we later want to manipulate this asset data (such as for displaying a death animation), we have three options:

crates/bevy_asset/src/server/mod.rs

@@ -266,6 +266,9 @@ impl AssetServer {
  /// it returns a "strong" [`Handle`]. When the [`Asset`] is loaded (and enters [`LoadState::Loaded`]), it will be added to the
  /// associated [`Assets`] resource.
  ///
+ /// Note that if the asset at this path is already loaded, this function will return the existing handle,
+ /// and will not waste work spawning a new load task.
+ ///
  /// In case the file path contains a hashtag (`#`), the `path` must be specified using [`Path`]
  /// or [`AssetPath`] because otherwise the hashtag would be interpreted as separator between
  /// the file path and the label. For example: