The fact that BlockPos is immutable is unfortunate, otherwise one could just pop an instance in a ThreadLocal and mutate it whenever it needed it. Better yet ju

The fact that BlockPos is immutable is unfortunate, otherwise one could just pop an instance in a ThreadLocal and mutate it whenever it needed it. Better yet just make it an interface. I wonder if it's common to run Minecraft in a profiler or something like that regularly over at Mojang. I used to do that a lot with this one app I used to work on and would routinely be surprised at what was actually going on under the hood.