BENCHMARKS OF COMPAQ 386 MODEL 40
(16 MHz 80386, 8 MHz 80287, 42 Mbyte CDC hard disk)
--------------------------------------------------

This base model comes with 1 Mbyte of memory in the form of 256k chips
(36 of them) marked AAA 2800P-8.  The brand is "NMBS" (Japan).
Memory is addressed as 32-bit words, and expands to 10 Mbytes in a single
slot.  The rest of the bus is 16 bits wide, compatible with PC/AT.)

-------------

The following version of the Sieve of Eratosthenes executes in 0.62 sec
when compiled under Microsoft C 4.0 with /AS (small model) and /G2
(80286 code) switches:

#include <stdio.h>

#define SIZE   8190
#define NITERS 10
#define FALSE  0
#define TRUE   1

char flag[SIZE+1];

main()
{
  register int i, prime, k, count, iter;

  printf("%d iterations:", NITERS);

  for( iter=1; iter <= NITERS; iter++ )
  {
     count = 0;
     for( i=0; i <= SIZE; i++ )
        flag[i] = TRUE;

     for( i=0; i <= SIZE; i++ )
     {
        if( flag[i] )
        {
           prime = i + i + 3;
           k = i + prime;
           while ( k <= SIZE ) {
              flag[k] = FALSE;
              k += prime;
           }
           count++;
        }
     }
  }
  printf("\n%d primes found.\n", count);
}

If k is listed first in the declarations, MS C actually makes it a register
variable, and execution time decreases to 0.59 sec.

-----------

The standard Whetstone program in Fortran, compiled under IBM Professional
Fortran 1.00, runs in 5.71 seconds, producing 175,000 Whetstones/sec.
(A VAX 11/780 is said to produce about the same, though I haven't tested
it myself.)

This program was described by Curnow and Wichmann, in The Computer Journal,
Volume 19, #1.

------------

The Dhrystone benchmark, originally written in ADA by Reinhold Weicker, 
is being distributed in a C version over UseNet by Rick Richardson
(ihnp4!castor!pcrat!rick).  Here are some of the results from version 1.1
of that C program:

 * MACHINE MICROPROCESSOR OPERATING   COMPILER               DHRYSTONES/SEC.
 * TYPE          SYSTEM                                     NO REG       REGS
 * ---------------------------------------------------    ----------   ---------
 * Apple IIe  65C02-1.02Mhz  DOS 3.3 Aztec CII v1.05i         37          37
 * -    Z80-2.5Mhz  CPM-80 v2.2 Aztec CII v1.05g              91          91
 * -    8086-8Mhz   RMX86 V6 Intel C-86 V2.0                 197         203 LM?
 * IBM PC/XT  8088-4.77Mhz COHERENT 2.3.43  Mark Wlms        259         275
 * -    8086-8Mhz   RMX86 V6 Intel C-86 V2.0                 287         304 ??
 * Fortune 32:16 68000-6Mhz  V7+sys3+4.1BSD  cc              360         346
 * PDP-11/34A w/FP-11C UNIX V7m cc                           406         449
 * Macintosh512  68000-7.7Mhz   Mac ROM O/S DeSmet(C ware)   625         625
 * VAX-11/750 w/FPA    UNIX 4.2BSD cc                        831         852
 * DataMedia 932 68000-10Mhz UNIX sysV   cc                  837         888
 * Plexus P35 68000-12.5Mhz  UNIX sysIII cc                  835         894
 * ATT PC7300 68010-10Mhz UNIX 5.0.3  cc                     973        1034
 * Compaq II  80286-8Mhz  MSDOS 3.1   MS C 3.0              1086        1140 LM
 * IBM PC/AT    80286-7.5Mhz    Venix/286 SVR2  cc          1159        1254 *15
 * Compaq II  80286-8Mhz  MSDOS 3.1   MS C 3.0              1190        1282 MM
 * MicroVAX II   -     Mach/4.3 cc                          1361        1385
 * DEC uVAX II   -     Ultrix-32m v1.1   cc                 1385        1399
 * Compaq II  80286-8Mhz  MSDOS 3.1   MS C 3.0              1351        1428
 * VAX 11/780 -     UNIX 4.2BSD cc                          1417        1441
 * VAX-780/MA780    Mach/4.3 cc                             1428        1470
 * VAX 11/780 -     UNIX 5.0.1  cc 4.1.1.31                 1650        1640
 * Ridge 32C V1  -     ROS 3.3     Ridge C (older)          1628        1695
 * Gould PN6005  -     UTX 1.1c+ (4.2)   cc                 1732        1884
>> Compaq 386 80386-16MHz MSDOS 3.1 MS C 4.0 Not optimized  2400        2580 MM
>> Compaq 386 80386-16MHz MSDOS 3.1 MS C 4.0 Optimized      2720        2840 MM
>> Compaq 386 80386-16MHz MSDOS 3.1 MS C 4.0 Not optimized  2790        3010 SM
>> Compaq 386 80386-16MHz MSDOS 3.1 MS C 4.0 Optimized      3140        3380 SM 
 * Gould PN9080  custom ECL  UTX-32 1.1C cc                 4745        4992
 * VAX-784 -     Mach/4.3 cc                                5263        5555 &4
 * VAX 8600   -     4.3 BSD     cc                          6329        6423
 * Amdahl 5860   -     UTS sysV cc 1.22                    28735       28846
 * IBM3090/200   -     ?     ?                             31250       31250

(MM stands for medium model; SM for small model)
------------

The CORE hard-disk testing program, version 1.0 (sometimes called DISKSPD),
gives the following results on the hard disk:

        Average access, track-to-track    :  4.39 ms
        Average access, random and t-to-t : 12.36 ms
        Average access, random            : 20.2  ms
 
Version 2.7 of this program (sometimes called CORETEST) gives these results:

        Size : 42.6 Mbytes;  Heads : 5;  Cylinders : 979;
        Sectors : 17 ; Data : 977 Kbytes;

        Data transfer rate           : 234.6 Kbytes / sec
        Average seek time (979 cyls) : 26.1 ms;
        Track-to-track seek          :  4.1 ms
        Performance index            : 3.503