Pointer arithmetic and comparisons.

[Walter Bright]

In article <2908 at murtoa.cs.mu.oz.au> rob at murtoa.UUCP (Robert Wallen) writes:
<Now a beef.  Why check for (p <= pend)?  Why not just ( p == pend) ?
<After all,
<its not as though your code might accidentally skip over the last entry !!

(p <= pend) generates more efficient code (on PC's) than (p == pend), because
on the former only the offset portions of the pointer need to be compared,
while on the latter both the segment and the offset must be compared.