JavaScript paravirtualized kernel

https://blog.netbsd.org/tnf/entry/kernel_drivers_compiled_to_javascript

>>4
Actually, writing hex code directly can enable some
rare optimizations, like e.g. using address/instruction
as value(+location-dependent opcodes)
or self-modifying code which is not allowed/supported by assembler.
The disadvantages: it destroys cache coherency, and is impossible to debug and read. You'll also have to allow executable segments to be writeable(and possibly disable executable stack protection).

[xxyyzzaa] can be executed at 4 locations.
from xx,yy,zz,aa and each are either values or opcodes
This allows packing alot of really cryptic code.