Building the fastest Lua interpreter automatically
I work on a game, that mostly uses lua as logic code, saddling on a c/c++ engine. One of the engine developers implemented lua jit years ago and found that for the actual performance, the interpreter/jit  was neglibable, the most expensive thing being the actual switch between luacode and c-code, which is with a large API a constant ugly background performance loss.The lua code by itself did not ran long enough to actually profit much from optimizations much.So, back then we did discuss possible solutions, and one idea was to basically notice a upcoming C-Call in bytecode ahead of execution, detect the stability of the arguments ahead of time. A background thread, extracts the values, perform the Call-processing of arguments and return pushes the values onto the stack, finally setting a "valid" bit to unblock the c-call (which by then actually is no longer a call). Both sides never have a complete cache eviction and live happily ever after. Unfortunatly i have a game dev addiction, so nothing ever came of it.But similar minds might have pushed similar ideas.. so asking the hive for this jive. Anyone ever seen something similar in the wild?