> > In the common (real-life) case, the test of the first word suffices. > > The word-at-a-time scan can be made to run fairly fast, especially if > > you have the option of first putting a non-zero word just after the > > buffer, so that no explicit bounds test is necessary in the loop. > > Or temporarily unzeroing the last word in the buffer.
So if you are asked to allocate a disk block only to write a block of zeroes, don't! I can dig that! That fills a hole in my education. Thanks guys!
