↑ ↓ ← → "Alex Vinokur" <alexvn connect.to>
writes:
An algorithm which computes very long Fibonacci numbers
http://groups.google.com/groups?selm=bnni5p%2412i47o%241%40ID-79865.news.uni-berlin.de
was used as a performance testsuite
to compare speed of the code produced by various compilers.
===========================================================
Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 2
Intel(R) Celeron(R) CPU 1.70 GHz
GNU time 1.7 (to get the real time used)
===========================================================
A. Real and processor time used to compute Fibonacci[10000] and
Fibonacci[25000].
Here are summary results.
|=========================================================
| | Opt | Fib-10000 | Fib-25000 |
| Compiler | Lev |-------------|-------------|
| | | Real : CPU | Real : CPU |
|========================================================|
| GNU gcc compiler |
|--------------------------------------------------------|
| g++ 3.3.1 (Cygwin) | No | 0.45 : 0.41 | 1.86 : 1.81 |
| | O1 | 0.28 : 0.24 | 1.03 : 0.99 |
| | O2 | 0.27 : 0.23 | 1.02 : 0.98 |
| | O3 | 0.27 : 0.24 | 1.02 : 0.98 |
| | | : | : |
| g++ 3.3.1 (Cygwin) | No | 0.33 : 0.30 | 1.59 : 1.56 |
| Mingw32 interface | O1 | 0.20 : 0.16 | 0.87 : 0.84 |
| | O2 | 0.19 : 0.16 | 0.85 : 0.82 |
| | O3 | 0.19 : 0.16 | 0.85 : 0.82 |
| | | : | : |
| gpp 3.2.1 (DJGPP) | No | 0.37 : 0.24 | 1.99 : 1.92 |
| | O1 | 0.20 : 0.11 | 1.15 : 1.05 |
| | O2 | 0.19 : 0.11 | 1.08 : 0.99 |
| | O3 | 0.19 : 0.11 | 1.08 : 0.99 |
| | | : | : |
|--------------------------------------------------------|
| Digital Mars C/C++ Compiler, STLport 4.5.3 |
|--------------------------------------------------------|
| Version 8.35n | - | 0.20 : 0.16 | 0.84 : 0.80 |
| | | : | : |
| Version 8.36.4n | - | 0.20 : 0.16 | 0.84 : 0.80 |
|=========================================================
B. The names of DLL files on which the programs depend :
* g++ 3.3.1 (Cygwin)
------------------
C:\cygwin\bin\cygwin1.dll
C:\WINNT\System32\KERNEL32.dll
C:\WINNT\System32\NTDLL.DLL
* g++ 3.3.1 (Cygwin, Mingw32 interface)
-------------------------------------
C:\WINNT\System32\msvcrt.dll
C:\WINNT\System32\KERNEL32.dll
C:\WINNT\System32\NTDLL.DLL
* gpp 3.2.1 (DJGPP)
-----------------
Unknown
* Digital Mars C/C++ 8.35n
------------------------
C:\WINNT\System32\KERNEL32.DLL
C:\WINNT\System32\NTDLL.DLL
C:\WINNT\System32\USER32.DLL
C:\WINNT\System32\GDI32.DLL
C. Notes.
Note-1. The main() program in
http://groups.google.com/groups?selm=bnni5p%2412i47o%241%40ID-79865.news.uni-berlin.de
was slightly changed to get the processor time used.
// ------ Updated main() : BEGIN ------
#include <time.h> // Added
int main (int argc, char **argv)
{
const string option (check (argc, argv));
if (option.empty())
{
usage (argv);
return 1;
}
const uint N = atoi (argv[2]);
const clock_t clock_start = clock(); // Added
assert (clock_start != clock_t (-1)); // Added
if (option == ALL_FIBS)
{
Fibonacci fib(N);
fib.show_all_numbers();
}
if (option == TH_FIB)
{
Fibonacci fib(N);
fib.show_last_number();
}
if (option == SOME_FIBS)
{
Fibonacci fib;
for (int i = 2; i < argc; i++) fib.show_number (atoi(argv[i]));
}
if (option == RAND_FIBS)
{
const int max_rand_fib = (argc == 3) ? MAX_RAND_FIB : atoi (argv[3]);
Fibonacci fib;
for (uint i = 0; i < N; i++) fib.show_number (rand()%max_rand_fib);
}
// ------ Added : BEGIN ------
const clock_t clock_end = clock();
assert (clock_end != clock_t (-1));
cerr << "CPU time used : " << (double (clock_end -
clock_start)/CLOCKS_PER_SEC) << " sec" << endl;
// ------ Added : END --------
return 0;
}
// ------ Updated main() : END --------
Note-2. To get the real time used the time() utility was used.
D. Comment.
It seems that there is some inconsistency between real-time and CPU-time
while computing Fibonacci [10000] through the DJGPP gpp compiler :
CPU-time is too small with regard to real-time.
Probably that might be caused by too small CLOCKS_PER_SEC value (91).
Note. In Cygwin, MinGW, Digital Mars : CLOCKS_PER_SEC = 1000.
--
=====================================
Alex Vinokur
mailto:alexvn connect.to
http://mathforum.org/library/view/10978.html
news://news.gmane.org/gmane.comp.lang.c++.perfometer
=====================================
↑ ↓ ← → "Alex Vinokur" <alexvn connect.to>
writes:
"Alex Vinokur" <alexvn connect.to> wrote in message
news:bnoa4v$38b$1 digitaldaemon.com...
An algorithm which computes very long Fibonacci numbers
http://groups.google.com/groups?selm=bnni5p%2412i47o%241%40ID-79865.news.uni-berlin.de
was used as a performance testsuite
to compare speed of the code produced by various compilers.
===========================================================
Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 2
Intel(R) Celeron(R) CPU 1.70 GHz
GNU time 1.7 (to get the real time used)
===========================================================
Real and processor time used to compute
* Fibonacci[10000],
* Fibonacci[25000],
* Fibonacci[50000]
has been measured.
Here are summary results.
|========================================================================|
| | Opt | Fib-10000 | Fib-25000 | Fib-50000 |
| Compiler | Lev |-------------|-------------|---------------|
| | | Real : CPU | Real : CPU | Real : CPU |
|========================================================================|
| GNU gcc compiler |
|------------------------------------------------------------------------|
| g++ 3.3.1 (Cygwin) | No | 0.45 : 0.41 | 1.86 : 1.81 | 6.63 : 6.58 |
| | O1 | 0.28 : 0.24 | 1.03 : 0.99 | 3.87 : 3.60 |
| | O2 | 0.27 : 0.23 | 1.02 : 0.98 | 3.79 : 3.73 |
| | O3 | 0.27 : 0.24 | 1.02 : 0.98 | 3.81 : 3.74 |
| | | : | : | : |
| g++ 3.3.1 (Cygwin) | No | 0.33 : 0.30 | 1.59 : 1.56 | 5.71 : 5.66 |
| Mingw32 interface | O1 | 0.20 : 0.16 | 0.87 : 0.84 | 3.02 : 2.97 |
| | O2 | 0.19 : 0.16 | 0.85 : 0.82 | 2.97 : 2.91 |
| | O3 | 0.19 : 0.16 | 0.85 : 0.82 | 2.98 : 2.93 |
| | | : | : | : |
| gpp 3.2.1 (DJGPP) | No | 0.37 : 0.24 | 1.99 : 1.92 | 10.53 : 10.42 |
| | O1 | 0.20 : 0.11 | 1.15 : 1.05 | 7.48 : 7.37 |
| | O2 | 0.19 : 0.11 | 1.08 : 0.99 | 7.23 : 7.12 |
| | O3 | 0.19 : 0.11 | 1.08 : 0.99 | 7.25 : 7.12 |
| | | : | : | : |
|------------------------------------------------------------------------|
| Digital Mars C/C++ Compiler, STLport 4.5.3 |
|------------------------------------------------------------------------|
| Version 8.35n | - | 0.20 : 0.16 | 0.84 : 0.80 | 3.82 : 3.74 |
|========================================================================|
--
=====================================
Alex Vinokur
mailto:alexvn connect.to
http://mathforum.org/library/view/10978.html
news://news.gmane.org/gmane.comp.lang.c++.perfometer
=====================================
↑ ↓ ← → Heinz Saathoff <hsaat bre.ipnet.de>
writes:
Alex Vinokur schrieb...
Here are summary results.
|========================================================================|
| | Opt | Fib-10000 | Fib-25000 | Fib-50000 |
| Compiler | Lev |-------------|-------------|---------------|
| | | Real : CPU | Real : CPU | Real : CPU |
|========================================================================|
| GNU gcc compiler |
|------------------------------------------------------------------------|
| g++ 3.3.1 (Cygwin) | No | 0.45 : 0.41 | 1.86 : 1.81 | 6.63 : 6.58 |
| | O1 | 0.28 : 0.24 | 1.03 : 0.99 | 3.87 : 3.60 |
| | O2 | 0.27 : 0.23 | 1.02 : 0.98 | 3.79 : 3.73 |
| | O3 | 0.27 : 0.24 | 1.02 : 0.98 | 3.81 : 3.74 |
| | | : | : | : |
| g++ 3.3.1 (Cygwin) | No | 0.33 : 0.30 | 1.59 : 1.56 | 5.71 : 5.66 |
| Mingw32 interface | O1 | 0.20 : 0.16 | 0.87 : 0.84 | 3.02 : 2.97 |
| | O2 | 0.19 : 0.16 | 0.85 : 0.82 | 2.97 : 2.91 |
| | O3 | 0.19 : 0.16 | 0.85 : 0.82 | 2.98 : 2.93 |
| | | : | : | : |
| gpp 3.2.1 (DJGPP) | No | 0.37 : 0.24 | 1.99 : 1.92 | 10.53 : 10.42 |
| | O1 | 0.20 : 0.11 | 1.15 : 1.05 | 7.48 : 7.37 |
| | O2 | 0.19 : 0.11 | 1.08 : 0.99 | 7.23 : 7.12 |
| | O3 | 0.19 : 0.11 | 1.08 : 0.99 | 7.25 : 7.12 |
| | | : | : | : |
|------------------------------------------------------------------------|
| Digital Mars C/C++ Compiler, STLport 4.5.3 |
|------------------------------------------------------------------------|
| Version 8.35n | - | 0.20 : 0.16 | 0.84 : 0.80 | 3.82 : 3.74 |
|========================================================================|
Did you supply any optimization switches to DM? Maybe you can run the
program without optimization, with switch -o+speed and -o+all ?
- Heinz
↑ ↓ ← → "Alex Vinokur" <alexvn connect.to>
writes:
"Heinz Saathoff" <hsaat bre.ipnet.de> wrote in message
news:MPG.1a0cab0bf20ce2289896d5 news.digitalmars.com...
[snip]
Did you supply any optimization switches to DM? Maybe you can run the
program without optimization, with switch -o+speed and -o+all ?
Yes, I do.
Here is a new report.
#######################################################
# C++ Compilers : Comparative Performance Measurement #
#######################################################
Testsuite : Computing very long Fibonacci numbers
Source : http://groups.google.com/groups?selm=bo4nls%2417vfq6%241%40ID-79865.news.uni-berlin.de
Metrics
* Real time - Elapsed (wall clock) time (seconds)
* CPU time - Processor time used (seconds)
Environment
* Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 2
* Intel(R) Celeron(R) CPU 1.70 GHz
* GNU time 1.7 (to get the real time)
Report-1.1
==============================================================================
| | Opt. | Fib-10000 | Fib-25000 | Fib-50000 |
| Compiler | Level |---------------|---------------|---------------|
| | | Real : CPU | Real : CPU | Real : CPU |
|============================================================================|
| GNU gcc compiler |
|----------------------------------------------------------------------------|
| | | : | : | : |
| g++ 3.3.1 (Cygwin) | None | 0.49 : 0.42 | 1.90 : 1.84 | 6.91 : 6.79 |
| | O1 | 0.32 : 0.24 | 1.07 : 1.00 | 3.93 : 3.87 |
| | O2 | 0.31 : 0.23 | 1.05 : 0.98 | 3.88 : 3.80 |
| | O3 | 0.31 : 0.24 | 1.05 : 0.99 | 3.88 : 3.79 |
| | | : | : | : |
| g++ 3.3.1 (Cygwin) | None | 0.39 : 0.30 | 1.64 : 1.58 | 5.81 : 5.75 |
| Mingw32 Interface | O1 | 0.24 : 0.16 | 0.91 : 0.85 | 3.10 : 3.05 |
| | O2 | 0.23 : 0.17 | 0.89 : 0.84 | 3.03 : 2.98 |
| | O3 | 0.26 : 0.16 | 0.90 : 0.84 | 3.04 : 2.99 |
| | | : | : | : |
| gpp 3.3.2 (DJGPP) | None | 0.48 : 0.31 | 2.07 : 1.92 | 11.17 : 11.01 |
| | O1 | 0.24 : 0.13 | 1.17 : 1.06 | 7.86 : 7.75 |
| | O2 | 0.25 : 0.13 | 1.16 : 1.04 | 7.74 : 7.58 |
| | O3 | 0.25 : 0.13 | 1.19 : 1.10 | 7.90 : 7.80 |
| | | : | : | : |
|----------------------------------------------------------------------------|
| GNU gcc compiler, STLport 4.5.3 |
| Proposed and supported by Gerrit P. Haase |
|----------------------------------------------------------------------------|
| g++ 3.3.1 (Cygwin) | None | 0.45 : 0.36 | 1.44 : 1.37 | 5.16 : 5.06 |
| STLport 4.5.3 | O1 | 0.32 : 0.21 | 0.95 : 0.89 | 3.47 : 3.39 |
| | O2 | 0.29 : 0.21 | 0.98 : 0.92 | 3.58 : 3.49 |
| | O3 | 0.30 : 0.22 | 1.01 : 0.95 | 3.67 : 3.60 |
| | | : | : | : |
|----------------------------------------------------------------------------|
| Digital Mars C/C++ Compiler, STLport 4.5.3 |
|----------------------------------------------------------------------------|
| DMC Version 8.35n | None | 0.28 : 0.16 | 0.89 : 0.81 | 3.87 : 3.80 |
| STLport 4.5.3 | Speed | 0.25 : 0.14 | 0.78 : 0.70 | 3.44 : 3.37 |
| | Space | 0.23 : 0.14 | 0.75 : 0.68 | 3.41 : 3.31 |
| | | : | : | : |
==============================================================================
Compilation
===========
* g++ 3.3.1, Cygwin
-----------------
g++ -W -Wall foo.cpp [Optimize Option] -o foo.exe
* g++ 3.3.1, Cygwin, Mingw32 interface
------------------------------------
g++ -W -Wall -mno-cygwin foo.cpp [Optimize Option] -o foo.exe
* g++ 3.3.1, Cygwin, STLport 4.5.3
--------------------------------
g++ -W -Wall foo.cpp -I/STLport-4.5.3/stlport /lib/libstlport_cygwin.a
[Optimize Option] -o foo.exe
* gpp 3.3.2, DJGPP
----------------
gpp -W -Wall foo.cpp [Optimize Option] -o foo.exe
* Digital Mars C/C++ 8.35n, STLport 4.5.3
---------------------------------------
dmc [Optimize Option] -I. -IC:/dm/stlport/stlport foo.cpp -ofoo.exe
The names of DLL files on which the programs depend
===================================================
* g++ 3.3.1, Cygwin
-----------------
C:\cygwin\bin\cygwin1.dll
C:\WINNT\System32\KERNEL32.dll
C:\WINNT\System32\NTDLL.DLL
* g++ 3.3.1, Cygwin, Mingw32 interface
------------------------------------
C:\WINNT\System32\msvcrt.dll
C:\WINNT\System32\KERNEL32.dll
C:\WINNT\System32\NTDLL.DLL
* g++ 3.3.1, Cygwin, STLport 4.5.3
--------------------------------
C:\cygwin\bin\cygwin1.dll
C:\WINNT\System32\KERNEL32.dll
C:\WINNT\System32\NTDLL.DLL
* gpp 3.3.2, DJGPP
----------------
DJGPP doesn't support dynamic linking.
* Digital Mars C/C++ 8.35n, STLport 4.5.3
---------------------------------------
C:\WINNT\System32\KERNEL32.DLL
C:\WINNT\System32\NTDLL.DLL
C:\WINNT\System32\USER32.DLL
C:\WINNT\System32\GDI32.DLL
--
======================================================
Alex Vinokur
mailto:alexvn connect.to
http://mathforum.org/library/view/10978.html
news://news.gmane.org/gmane.comp.lang.c++.perfometer
======================================================
↑ ↓ ← → Heinz Saathoff <hsaat bre.ipnet.de>
writes:
Alex Vinokur wrote...
[snip]
Did you supply any optimization switches to DM? Maybe you can run the
program without optimization, with switch -o+speed and -o+all ?
Yes, I do.
Here is a new report.
|----------------------------------------------------------------------------|
| Digital Mars C/C++ Compiler, STLport 4.5.3 |
|----------------------------------------------------------------------------|
| DMC Version 8.35n | None | 0.28 : 0.16 | 0.89 : 0.81 | 3.87 : 3.80 |
| STLport 4.5.3 | Speed | 0.25 : 0.14 | 0.78 : 0.70 | 3.44 : 3.37 |
| | Space | 0.23 : 0.14 | 0.75 : 0.68 | 3.41 : 3.31 |
| | | : | : | : |
==============================================================================
Interestingly the performance of space optimization is better than speed
optimization.
- Heinz
↑ ↓
← → Ilya Minkov <minkov cs.tum.edu>
writes:
How about -ffast-math on GCC? It should omit errno then. I wonder if it
gets any faster or not.
Heinz Saathoff wrote:
Did you supply any optimization switches to DM? Maybe you can run the
program without optimization, with switch -o+speed and -o+all ?
- Heinz
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