BerryBots demo

Oh, definitely the advantage is much higher in the pure Lua code. The more time being spent in Lua code, the more you'll gain from LuaJIT. I wouldn't be surprised to see more like 10x-20x gains with really complex bots. Some of the benchmark comparisons on luajit.org go as high as 50x.

I'm a little surprised 8x RB has a higher gain than 2x RB. The game engine is pretty fast, but some of it is <math>O({n^2})</math> (the line of sight and ship-ship collision detection), so for something like 8x a trivial bot, the engine is using a lot more CPU, which obviously gains nothing from LuaJIT. But I guess it's also sending more event data to the bots each tick, too (even if it's going unused here), which is sped up by LuaJIT.

Good point on RISC vs CISC, I hadn't thought of that. It could also indeed just be more mature on x86.