I was under the misimpression, that
<b><tt>- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet options:(unsigned int)mask</tt></b>
is faster than
<b><tt>- (NSRange)rangeOfString:(NSString *)aString options:(unsigned)mask</tt></b>.
It is not so. At least not on Panther with my G5. In fact <tt>rangeOfString</tt> is faster.