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diff --git a/TODO.md b/TODO.md
index 24c1db8..2283383 100644
--- a/TODO.md
+++ b/TODO.md
@@ -13,7 +13,10 @@
     - [ ] Effects using stencil buffer
 - [x] Remove position field from Camera component
 - [ ] Remove possible edge cases in ECS component storage
+    - [ ] A Query<()> yields all components. Should this be the behaviour?
 - [ ] Improve ECS component storage performance
+    - [ ] Give archetypes edges for faster component addition & removal
+    - [ ] Store components of the same kind in the same memory allocation (not boxed)
 - [ ] Investigate what happends when a entity has all of it's components removed.
 - [x] Add support for entities with no components
 - [x] Fix OpenGL warning "Vertex shader in program 3 is being recompiled based on GL state".