In Membrane, we use nested structs and (usually small) maps for element state, which is basically a GenServer state. There are rather no heavy loops over it, but we figured out that access to structs impacts performance significantly. So we replaced Elixir’s Access by macros that construct pattern matches in the compile time. That turned out to provide significant speedup in some of our benchmarks. Not sure if that’s what you’re looking for, but I guess speeding up structs/maps themselves could give Membrane another boost.
