[cogman10]

> ECS have better performance than inheritance

Can have.

Whether or not an ECS will actually be faster depends entirely on the type of game and access patterns of the inheritance structure. Further, it matters how you are doing inheritance (LTO can eliminate a lot of the pitfalls even if you use virtual function calls).

This is nothing against ECS. I just find the current claims of performance dubious and potentially flat out wrong given modern compiler optimizations and changes in CPU caches (mainly that they got a LOT bigger).

[stelonix]

I believe claims of "compilers getting faster/bigger enough" are the exact reason we have ECS now. It surely depends of the kind of game, but games with any kind of entity which isn't unique should feel the performance improvements.

Ideally, compilers should be able to transform classes into ECS layout when generating code. Shouldn't be hard to have a pass before compilation, if we use clang.