Re: C programming langauge on Apple II

["mdj" <mdj.mdj@gmail.com>]

Michael J. Mahon wrote:

> Common subexpressions, constant folding, most branch to branch
> elimination, etc., are all nicely done at the machine-independent
> stage.
>
> The most important machine-dependent optimizations have to do with
> mapping the semantics to machine resources (registers and page zero),
> particularly to optimize addressing.

And of course, which particular items you choose to prioritise has a
tremendous impact on final performance, and generally such decisions
can only be made at compile time for trivial programs - where there is
a small enough number of critical items that they'll mostly fit in
performant machine areas

High performance C on a 6502 is a fascinating problem, and one that a
6502 is ill equipped to solve unfortunately :-)

Matt