18 Feb
2022
18 Feb
'22
1:59 a.m.
Leah Neukirchen <leah(a)vuxu.org> writes:
Apparently it was a popular benchmark back in the
day:
https://www.tuhs.org/Archive/Documentation/AUUGN/AUUGN-V05.1.pdf
> [...]
> By comparison, a VAX 11/780 clocks about 5 to 6 secs, VAX750 9 sec, PDPIIs
> range from 27 secs (11/23) to 6 secs (11/70), PDP ii/34s range from 12 to 19
> secs depending upon the presence of a cache. Perkin-Elmer range from 12o5
> secs (32/10) to 7°9 secs (32/40)o
Well, I just had to run it on some older hardware...
12MHz 80286 running MINIX 1.6.25 and the classic C version of dc:
real 4.00
user 3.56
sys 0.25
DEC MicroPDP-11/23 running PWB UNIX 1.0 and the assembly coded dc:
real 29.0
user 22.2
sys 0.7
Watching the prime number generator (from the Wikipedia page on dc)
running on the 11/23 is much more entertaining than doing it on the
modern workstation I'm typing this on:
2p3p[dl!d2+s!%0=@l!l^!<#]s#[s/0ds^]s@[p]s&[ddvs^3s!l#x0<&2+l.x]ds.x
Incidentally, the Wikipedia page only lists Robert Morris as author of
dc. If anyone here is able to edit Wikipedia, now would be a good time
to get Lorinda Cherry's name on there, too.
-tih
--
Most people who graduate with CS degrees don't understand the significance
of Lisp. Lisp is the most important idea in computer science. --Alan Kay