The Pharo VM (a version of Cog VM) is a VM that optimizes execution
by mapping contexts to stack frames and lazily instantiating contexts.
It further jits/compiles methods used more than once to machine-code and implements a number of send optimization schemes in that machine-code.
Note that we use only use with a special label for building:
The names of these labels is essential as we rely on them to extract the generated VM in downstream builds.