Re: Compilation to native

[Richard Stallman]

    There are several declaration forms in the CL package
    (info "(cl)Declarations") which are intended for optimising
    compilers, but currently unused.  They could be used for the
    native code compiler.

CL is an optional extension package which is present in
Emacs for the sake of those who want to load it.
It is not part of Emacs Lisp.  It would be erroneous
for the Emacs Lisp compiler to expect people to use CL constructs.

We can consider proposals to add some sort of optimization declaration
construct to the Emacs Lisp language.  Compatibility with Common Lisp
is not a primary design goal for this, but all else being equal
it is better to be compatible than not.