Exec/Compile/Link Speed Comparison gcc/vc++

Earnie Boyd earnie_boyd@yahoo.com
Thu Dec 23 05:26:00 GMT 1999


Hi John,

You said that gcc is from www.cygnus.com, is that the Cygwin version of gcc or
the Mingw32 version of gcc?  The Cygwin version carries the extra weight of the
POSIX runtime layer and would be slower than Mingw32.  Your timing results are
very impressive for Cygwin; but, I would like to see your timings run with
Mingw32.

TIA,
Earnie

--- John pullitr <pullitr@gmx.net> wrote:
> comparison of 5 runs of the same neural network program:
> using math.h : double *, /, exp() function
> compiled in cmd-session NT4/SP3/PII-350
> for different compilers: w=watcom,m=microsoft,g=gcc,
> (gcc is from www.cygnus.com), b4.5 borland, 
> cb4 (=borland cppbuilder v5.4 = V4)
> lcc/win32, w32c=win 32 console
> execute 5 times : (make clean ; make ; + run)
> for each compiler with optimization on/off
> 
> Summary
> M6.0 is fastest  = 1.62 seconds
> W10.6 32 console = 2.95 seconds            (154% of M6.0)
> gcc  2.95.2      = 2.28 seconds            (140% of M6.0)
> cppbuilder V4.0    2.90 seconds
> 
> Compiler  (CFLAGS)          Execute(%)    Comp/link(%) Count
>                             size [bytes]    min - max     min - max
> m5.0                         3.41(210.4%)  3.08(146.2%)  5
>                             128000            3.13- 3.75    2.73- 3.49
> m6.0                         3.09(190.6%)  3.21(152.2%)  5
>                             122880            2.92- 3.23    3.03- 3.57
> g2.95.2                      3.09(190.7%)  5.93(281.4%)  5
>                              96307            3.05- 3.15    5.79- 6.27
> cb4  -Od                     3.16(194.8%)  2.77(131.5%)  5
>                             133120            2.97- 3.85    2.64- 2.98
> b4.5  -Od                    4.12(254.4%)  2.14(101.6%)  5
>                             111217            4.05- 4.30    1.39- 2.36
> w10.6/d16                    8.54(527.3%)  6.63(314.7%)  5
>                             129544            8.22- 9.38    6.58- 6.69
> w10.6/w32c                   3.16(194.8%)  8.82(418.5%)  5
>                             119451            3.10- 3.27    8.49- 9.73
> w10.6/d32                    2.70(166.7%)  5.37(254.6%)  5
>                             155409            2.65- 2.72    5.20- 5.60
> lcc                          3.37(208.3%)  2.11(100.0%)  5
>                              72220            3.15- 3.93    2.02- 2.18
> 
> 
>                  Optimization ON
> 
> 
> m5.0  /Ox /G5                1.95(120.5%)  5.77(273.9%)  5
>                             103936            1.89- 2.04    5.65- 6.04
> m6.0  /Ox /G5                1.62(100.0%)  6.32(300.0%)  5
>                              94208            1.56- 1.66    5.90- 7.50
> g2.95.2  -O2                 2.28(140.9%) 12.65(600.2%)  5
>                              75107            2.24- 2.33   12.35-13.11
> cb4  -O2                     2.90(179.0%)  3.08(146.0%)  5
>                             127488            2.77- 3.04    2.67- 4.57
> b4.5  -O2                    4.03(249.0%)  2.52(119.8%)  5
>                             114289            3.95- 4.18    2.32- 3.10
> w10.6/d16  -fpi87 -fp5 -ox   7.16(441.7%)  9.13(433.3%)  5
>                             128872            7.14- 7.18    8.78- 9.58
> w10.6/w32c  -fpi87 -fp5 -ox  2.95(181.8%) 10.75(510.1%)  5
>                             119416            2.66- 3.38   10.08-11.94
> w10.6/d32  -fpi87 -fp5 -ox   2.50(154.0%)  6.80(322.8%)  5
>                             137357            2.37- 2.75    6.59- 7.13
> lcc  -O                      2.45(151.3%)  2.24(106.1%)  5
>                              63032            2.39- 2.51    2.17- 2.28
> 
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=====
Earnie Boyd < mailto:earnie_boyd@yahoo.com >
Cygwin Newbies, please visit
< http://www.freeyellow.com/members5/gw32/index.html >
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