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# Objective At least partially addresses #6282. Resources are currently stored as a dedicated Resource archetype (ID 1). This allows for easy code reusability, but unnecessarily adds 72 bytes (on 64-bit systems) to the struct that is only used for that one archetype. It also requires several fields to be `pub(crate)` which isn't ideal. This should also remove one sparse-set lookup from fetching, inserting, and removing resources from a `World`. ## Solution - Add `Resources` parallel to `Tables` and `SparseSets` and extract the functionality used by `Archetype` in it. - Remove `unique_components` from `Archetype` - Remove the `pub(crate)` on `Archetype::components`. - Remove `ArchetypeId::RESOURCE` - Remove `Archetypes::resource` and `Archetypes::resource_mut` --- ## Changelog Added: `Resources` type to store resources. Added: `Storages::resource` Removed: `ArchetypeId::RESOURCE` Removed: `Archetypes::resource` and `Archetypes::resources` Removed: `Archetype::unique_components` and `Archetypes::unique_components_mut` ## Migration Guide Resources have been moved to `Resources` under `Storages` in `World`. All code dependent on `Archetype::unique_components(_mut)` should access it via `world.storages().resources()` instead. All APIs accessing the raw data of individual resources (mutable *and* read-only) have been removed as these APIs allowed for unsound unsafe code. All usages of these APIs should be changed to use `World::{get, insert, remove}_resource`. |
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| .. | ||
| entity_ref.rs | ||
| identifier.rs | ||
| mod.rs | ||
| spawn_batch.rs | ||
| world_cell.rs | ||