If you doing your own Forth CPU, make a barrel one [1] to hide any overhead. State of such individual CPU is small, you can easily have thousands of them. [1]

If you doing your own Forth CPU, make a barrel one [1] to hide any overhead. State of such individual CPU is small, you can easily have thousands of them. [1] https://en.wikipedia.org/wiki/Barrel_processor https://en.wikipedia.org/wiki/Barrel_processor If you do your implementation on regular CPU, do a software pipelined [2] interpreter, which also can do several threads of execution simultaneously. [2] https://en.wikipedia.org/wiki/Software_pipelining https://en.wikipedia.org/wiki/Software_pipelining Software pipelined stack machine interpreter was used to compress code for VLIW DSP.