Re: Shrinking the C core

[Alfred M. Szmidt]

   > The issue is not Emacs Lisp vs. Common Lisp.  What you mean is what
   > the difference is between SBCL and GNU Emacs.'
   >
   > The question can be rephrased as what is the difference between GNU
   > Emacs and GCC?  Why is GCC so much faster?  And if you phrase it like
   > that you will see that it really doesn't make much sense anymore,
   > since you are comparing different things.

   > Emacs could implement optimizaations that GCC does for C, or ADA
   > .. but it breaks down very quickly.

   Not really. Native compilation already uses GCC. At least on the byte
   code instructions and, separately, in subr code.
   There is more than just GCC vs byte code VM in it.

It is not about native compilation!  It is about what OPTIMIZATIONS
can be done to the actual code flow.  Just using GCC doesn't do ANY
optimizations to how the Lisp code is optimized or how its flow is
changed due to optimizations!