Sprite-, Shape- renderers should use a common data store template.

[Jerboa-app]

Template encapsulates logic of inserting, removing, identifying T's with priority ordering.

• Priority ordering
• Cached objects (in std::vector for contiguous access performance).
• Identity tracked.

Can't use map as the iteration on the cpu side is simply too slow compared to a pre-cached vector (contig.) and building the vec on the fly is also sub-optimal. (60fps, <100k shapes with a map, >500k with pre-cached vec).

[Jerboa-app]

https://en.cppreference.com/w/cpp/container/priority_queue

map of id to ptr