Re: sub-optimal code for packed boolean arrays -- bug or inherent limitation

[tmoran@acm.org]

> Well, sort of.  Pack means to minimize storage even at the (possible)
> expense of speed of accessing the components.  Speed overall can be
> improved by packing.  For example, speed of copying and comparing the
> ...
> Measurement is a Good Thing.
  In my benchmark runs, the
        B(I) := not B(I);
and
        B(I) := B(I) xor True;
versions went from 10 down to 7 nanoseconds when I removed the pragma
pack, but the version with
        One(i) := True;
        B   := B xor One;
went from 5 to 700 nanoseconds.