"chris" wrote in message news:[EMAIL PROTECTED]
> Alex Vinokur wrote:
>
> > ========================================
> > Comparative Performance of C++ Compilers
> > C/C++ Performance Tests
> > =========================================
> >
> >
> >
> <snip>
>
> While this is quite interesting, it seems to me you aren't really
> running these programs for long enough for us to be able to see what
> differences are due to startup time and due to runtime.
How can we know how long the startup time is?
> How about a couple of extra jobs, one of which runs for 1 minute and one for 2?
>
>
>
Three extra jobs for copyfile.cpp, g++ (Mingw32 Interface), No optimization.
* job-1 : 1 min 10 sec
* job-2 : 2 min 28 sec
* job-2 : 5 min 57 sec
$ g++ -mno-cygwin copyfile.cpp
$ command time -p a 1000 50 750 1 > out 2>&1 // job-1
$ cat out
=======================================
Simple C/C++ Perfometer : Copying files
Version CF-1.1
=======================================
---------------------
GNU gcc 3.3.1 (MINGW)
---------------------
YOUR COMMAND LINE : a.exe 1000 50 750 1
### File size : 1000
### Number of runs : 1
### Number of tests : 50
### Number of repetitions : 750
### CLOCKS_PER_SEC : 1000
Run-1 of 1 : Started ..................................................
c_1__functions_getc_putc : 45 units (0.045 secs)
c_2__functions_fgetc_fputc : 175 units (0.175 secs)
c_3__functions_fread_fwrite : 22 units (0.022 secs)
cpp_1__operators_in_out : 434 units (0.434 secs)
cpp_2__methods_get_put : 235 units (0.235 secs)
cpp_3__methods_sbumpc_sputc : 89 units (0.089 secs)
cpp_4__method_sbumpc__op_out : 41 units (0.041 secs)
cpp_5__method_rdbuf__op_out : 38 units (0.038 secs)
cpp_6__methods_cpp_read_write__const_buf : 39 units (0.039 secs)
cpp_7__methods_cpp_read_write__max_buf : 35 units (0.035 secs)
Run-1 of 1 : Finished
real 70.24
user 0.02
sys 0.07
$ command time -p a 1000 100 750 1 > out 2>&1 // job-2
$ cat out
=======================================
Simple C/C++ Perfometer : Copying files
Version CF-1.1
=======================================
---------------------
GNU gcc 3.3.1 (MINGW)
---------------------
YOUR COMMAND LINE : a.exe 1000 100 750 1
### File size : 1000
### Number of runs : 1
### Number of tests : 100
### Number of repetitions : 750
### CLOCKS_PER_SEC : 1000
Run-1 of 1 : Started
....................................................................................................
c_1__functions_getc_putc : 85 units (0.085 secs)
c_2__functions_fgetc_fputc : 324 units (0.324 secs)
c_3__functions_fread_fwrite : 42 units (0.042 secs)
cpp_1__operators_in_out : 782 units (0.782 secs)
cpp_2__methods_get_put : 411 units (0.411 secs)
cpp_3__methods_sbumpc_sputc : 157 units (0.157 secs)
cpp_4__method_sbumpc__op_out : 71 units (0.071 secs)
cpp_5__method_rdbuf__op_out : 64 units (0.064 secs)
cpp_6__methods_cpp_read_write__const_buf : 67 units (0.067 secs)
cpp_7__methods_cpp_read_write__max_buf : 62 units (0.062 secs)
Run-1 of 1 : Finished
real 208.71
user 0.05
sys 0.04
$ command time -p a 1000 200 750 1 > out 2>&1 // job-2
$ cat out
=======================================
Simple C/C++ Perfometer : Copying files
Version CF-1.1
=======================================
---------------------
GNU gcc 3.3.1 (MINGW)
---------------------
YOUR COMMAND LINE : a.exe 1000 200 750 1
### File size : 1000
### Number of runs : 1
### Number of tests : 200
### Number of repetitions : 750
### CLOCKS_PER_SEC : 1000
Run-1 of 1 : Started
....................................................................................................................................
....................................................................
c_1__functions_getc_putc : 81 units (0.081 secs)
c_2__functions_fgetc_fputc : 307 units (0.307 secs)
c_3__functions_fread_fwrite : 39 units (0.039 secs)
cpp_1__operators_in_out : 734 units (0.734 secs)
cpp_2__methods_get_put : 385 units (0.385 secs)
cpp_3__methods_sbumpc_sputc : 152 units (0.152 secs)
cpp_4__method_sbumpc__op_out : 67 units (0.067 secs)
cpp_5__method_rdbuf__op_out : 62 units (0.062 secs)
cpp_6__methods_cpp_read_write__const_buf : 62 units (0.062 secs)
cpp_7__methods_cpp_read_write__max_buf : 59 units (0.059 secs)
Run-1 of 1 : Finished
real 357.10
user 0.01
sys 0.04
--
Alex Vinokur
mailto:[EMAIL PROTECTED]
http://mathforum.org/library/view/10978.html
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