^3 Need 286 "C" benchmark
John Woods
john at x.UUCP
Thu Jun 6 02:12:45 AEST 1985
I ran the Knight's Tour program on CRDS' current 68000 computer, and on
our prototype 68020. I also compared our old C compiler against our new
C compiler from Green Hills. For comparison, I also ran it on a VAX 750
and a PDP 11/70 (my pet system at MIT). Also, for fun, I ran both 5x5 and
6x6 boards. The results:
12.5Mc [1] 12.5Mc [2] 12.5Mc Cast of Compilers
Board 68000 VAX750 68000 11/70 68020 WS C Whitesmiths
Size WS C pcc GH C V7 C GH C GH C GreenHills
----- ----- ----- ----- ----- pcc pcc VAX
5 x 5 5.1 3.5 3.5 2.3 1.7 V7 C God's own C
6 x 6 147 109 61 67 29.5
7 x 7 2859* * Ran on "frog", our
uucp machine, in
[1] mit-eddie background, just for
[2] mitccc amusement.
All these machines were lightly loaded during the tests, the times reported
are user-times (in seconds).
The 680?0 C compilers both use 32-bit "int"s.
One advantage the Greenhills compiler has over the old one is that it tries
to make clever use of spare registers lying around. I found the difference
quite instructive.
--
John Woods, Charles River Data Systems, Framingham MA, (617) 626-1101
...!decvax!frog!john, ...!mit-eddie!jfw, jfw%mit-ccc at MIT-XX.ARPA
"MU" said the Sacred Chao...
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