Emacs' native-compiler needs to handle 'declare' and 'the', even if they
are not yet in Emacs Lisp.

I have not the slightest idea how to help do that, but there are superb
compiler writers for Common Lisp
who can get fabulous performance improvements, say 8x, by taking advantage
of 'the' and 'declare'.

I cannot help, but I can easily give you trivial Common Lisp code to show
what I am talking about.

However, I conjecture that some of you very well know what I am talking
about, and that what I am saying is ridiculously obvious to those who know
what they are talking about.

So I won't bore you by saying more.

HIghest regards to you all,

Bob
--
Anything I seem to state should be taken as a question.  I am at least 77
and feeble.