Component reuse (like texture reuse)

[lmatteis-wm]

In Lightning there's logic to reuse textures and garbage collection mechanism to free unusued textures and reuse them when possible since it's quite computationally intensive to re-create them all the time.

We've noticed that extensive computation is also caused by component instantiation. Hence we were wondering whether similar logic could be applied to components instances as well.

We're trying to implement this at the app-level but it's getting quite convoluted and we were wondering if there was an easy way to avoid instantiating specific component types and instead reuse them from a pool of "unused" ones.

Thoughts?