Roadmap

Backlog

Improve the performance of required fragments by caching first-level required chunks.
Improve the performance of builders that are used multiple times by caching hint chunks.
Queries can cache major chunks to avoid finding them every time.
Should we make one builder:build method instead of :spawn and :clone?
Add multi-spawn to the builder to spawn multiple entities at once.
Add a function to shrink storages to free unused memory.
Should we cache the result of without_unique_fragments to clone faster?
observers and events
add INDEX fragment trait
use compact prefix-tree for chunks
optional ffi component storages
add EXCLUSIVE fragment trait