Thanks, that first post is really interesting. Two things stand out to me:

* Run regular code at run time - does this just error if you try to use const on something that depends on a runtime value?

* Add your own optimizations to the compiler - isn't this very dangerous, especially if optimizations from various sources of code get combined? Even if your optimizations are valid (which there seems to be no guarantee of), computer math is notorious for being different from real math. People unaware of the nuances of integers rolling over or floating point seem like they could easily shoot themselves in the foot here.