From: utzoo!decvax!yale-com!brunix!nkm
Newsgroups: net.micro
Title: Re: Lisa benchmark
Article-I.D.: brunix.1434
Posted: Mon Feb  7 08:02:57 1983
Received: Tue Feb  8 04:47:37 1983
References: sri-arpa.374


I find it pretty hard to believe that your Z-80 was able to countdown
from 10 million in 4 seconds. Even if your code compiled to 1 instruction
to do the whole shebang, it seems that your Z-80 would be running at
2.5 MIPS, making it closer to a Cray or a Dorado than something that
runs toasters. Having done a similar benchmark (counting to 50,000,000)
on any number of workstations (HP 9000, Xerox Dolphin, Dandelion, Apollo,
Sun, VAX,...) and gotten numbers on the order of 3 to 7 minutes, I don't
think I'm ready to by Tandy stock quite yet. My guess is that your BDS/C
compiler thinks ints are 16 bits long, i = 10000000 really assigns 0 to
i, and it takes 4 seconds to test and fail the while condition. Only
a guess...

Norm Meyrowitz
Brown University CS
!{decvax,cornell,vax135}!brunix!nkm