results.txt

C++的一个好库。。。现在很流行

// This benchmark is provided purely for information.
// It might not even compile as-is, 
//   or not give any sensible results. 
//      (e.g., it expects sprintf to be POSIX compliant)

 new results ( with  outsstream vs. stringstream)

bjam -sTOOLS="gcc intel-linux-7.1" -sBUILD="release"

( -sBUILD="profile"  for profiling..)


 "_no_reuse_stream" "_stringstr" "_strstream" _no_locale 

intel-linux-7.1

for comp in gcc  ; do 
   echo  "\n------------------- Compiler  $comp : ---------------- "
   for var in _overloads _basicfmt _normal; do 
     echo "\n-- Variant  **" $var "**" :
      texe=$EXEBOOST/libs/format/benchmark/bench_format${var}/${comp}/release/bench_format${var} ;
      ls -l $texe;
      $texe
   done
done


// stringstream recr殚 chaque fois.
-- Variant  ** _normal ** :
-rwx--x--x    1 sam      users       61952 Sep 17 03:13 /home/data/zStore/BBoost/bin/boost//libs/format/benchmark/bench_format_normal/gcc/release/bench_format_normal
printf time         :2.16
ostream time        : 3.69,  = 1.70833 * printf
parsed-once time    : 8.45,  = 3.91204 * printf ,  = 2.28997 * nullStream
reused format time  :10.94,  = 5.06481 * printf ,  = 2.96477 * nullStream
format time         :10.97,  = 5.0787 * printf ,  = 2.9729 * nullStream


Pour le parsing. step 1 : scan_not + str2int (version Iter const& qques % mieux)

------------------- Compiler  gcc : ----------------

-- Variant  ** _overloads ** :
-rwx--x--x    1 sam      users       52864 2003-09-12 02:59 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_overloads/gcc/release/bench_format_overloads
printf time         :2.21
ostream time        : 3.57,  = 1.61538 * printf
parsed-once time    : 4.93,  = 2.23077 * printf ,  = 1.38095 * nullStream
reused format time  : 9.25,  = 4.18552 * printf ,  = 2.59104 * nullStream
format time         :10.33,  = 4.67421 * printf ,  = 2.89356 * nullStream

-- Variant  ** _basicfmt ** :
-rwx--x--x    1 sam      users       52864 2003-09-12 03:00 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_basicfmt/gcc/release/bench_format_basicfmt
printf time         :2.2
ostream time        : 3.57,  = 1.62273 * printf
parsed-once time    : 4.85,  = 2.20455 * printf ,  = 1.35854 * nullStream
reused format time  : 9.25,  = 4.20455 * printf ,  = 2.59104 * nullStream
format time         :10.29,  = 4.67727 * printf ,  = 2.88235 * nullStream

-- Variant  ** _normal ** :
-rwx--x--x    1 sam      users       53088 2003-09-12 03:00 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_normal/gcc/release/bench_format_normal
printf time         :2.27
ostream time        : 3.47,  = 1.52863 * printf
parsed-once time    : 4.79,  = 2.11013 * printf ,  = 1.3804 * nullStream
reused format time  : 9.88,  = 4.35242 * printf ,  = 2.84726 * nullStream
format time         :10.97,  = 4.8326 * printf ,  = 3.16138 * nullStream

-------------------------------------------------------------------------------------------------
Overload : int, double char * -> put_simple :
#if defined(BOOST_FORMAT_OVERLOADS)
        template<class T>  
        basic_format&   operator%(const char* x) 
            { return io::detail::feed_overloaded(*this,x); }
        template<class T>  
        basic_format&   operator%(const double x)
            { return io::detail::feed_overloaded(*this,x); }
        template<class T>  
        basic_format&   operator%(const int x)
            { return io::detail::feed_overloaded(*this,x); }
#endif

    // put overloads for common types (-> faster)
    template< class Ch, class Tr, class T> 
    void put_simple( T x, 
                     const format_item<Ch, Tr>& specs, 
                     std::basic_string<Ch, Tr> & res, 
                     io::basic_outsstream<Ch, Tr>& oss_ )
    {
        typedef std::basic_string<Ch, Tr> string_t;
        typedef format_item<Ch, Tr>  format_item_t;
    
        specs.fmtstate_.apply_on(oss_);
        const std::ios_base::fmtflags fl=oss_.flags();
        const std::streamsize w = oss_.width();
      
        if(w!=0) 
            oss_.width(0);
        put_last( oss_, x);
        const Ch * res_beg = oss_.begin();
        std::streamsize res_size = std::min(specs.truncate_, oss_.pcount());
        int prefix_space = 0;
        if(specs.pad_scheme_ & format_item_t::spacepad)
            if( res_size == 0 ||   ( res_beg[0] !='+' && res_beg[0] !='-'  ))
                prefix_space = 1;
        mk_str(res, res_beg, res_size, w, oss_.fill(), fl, 
               prefix_space, (specs.pad_scheme_ & format_item_t::centered) !=0 );
        clear_buffer( oss_);
    } // end- put_simple(..)



------------------- Compiler  gcc : ----------------

-- Variant  ** _overloads ** :
-rwx--x--x    1 sam      users       52832 2003-09-12 00:17 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_overloads/gcc/release/bench_format_overloads
printf time         :2.13
ostream time        : 2.91,  = 1.3662 * printf
parsed-once time    : 4.48,  = 2.10329 * printf ,  = 1.53952 * nullStream
reused format time  : 9.42,  = 4.42254 * printf ,  = 3.23711 * nullStream
format time         : 11.1,  = 5.21127 * printf ,  = 3.81443 * nullStream

RERUN 
printf time         :2.09
ostream time        : 2.92,  = 1.39713 * printf
parsed-once time    : 4.43,  = 2.11962 * printf ,  = 1.51712 * nullStream
reused format time  : 9.29,  = 4.44498 * printf ,  = 3.18151 * nullStream
format time         :11.05,  = 5.28708 * printf ,  = 3.78425 * nullStream

-- Variant  ** _basicfmt ** :
-rwx--x--x    1 sam      users       52832 2003-09-12 00:17 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_basicfmt/gcc/release/bench_format_basicfmt
printf time         :2.16
ostream time        : 3.01,  = 1.39352 * printf
parsed-once time    : 4.41,  = 2.04167 * printf ,  = 1.46512 * nullStream
reused format time  : 9.61,  = 4.44907 * printf ,  = 3.19269 * nullStream
format time         :11.02,  = 5.10185 * printf ,  = 3.66113 * nullStream

-- Variant  ** _no_locale ** :
-rwx--x--x    1 sam      users       52192 2003-09-12 00:09 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_no_locale/gcc/release/bench_format_no_locale
printf time         :2.1
ostream time        : 2.87,  = 1.36667 * printf
parsed-once time    : 4.44,  = 2.11429 * printf ,  = 1.54704 * nullStream
reused format time  : 8.21,  = 3.90952 * printf ,  = 2.86063 * nullStream
format time         : 9.25,  = 4.40476 * printf ,  = 3.223 * nullStream

-- Variant  ** _normal ** :
-rwx--x--x    1 sam      users       53056 2003-09-12 00:17 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_normal/gcc/release/bench_format_normal
printf time         :2.18
ostream time        : 2.92,  = 1.33945 * printf
parsed-once time    : 5.75,  = 2.63761 * printf ,  = 1.96918 * nullStream
reused format time  :10.27,  = 4.71101 * printf ,  = 3.51712 * nullStream




















------------------- Compiler  gcc : ----------------

-- Variant  ** _normal ** :
-rwx--x--x    1 sam      users       49280 2003-09-10 21:12 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_normal/gcc/release/bench_format_normal
printf time         :2.16
ostream time        : 2.81,  = 1.30093 * printf
stored format time  :11.56,  = 5.35185 * printf ,  = 4.11388 * nullStream
format time         :18.69,  = 8.65278 * printf ,  = 6.65125 * nullStream

-- Variant  ** _static_stream ** :
-rwx--x--x    1 sam      users       45856 2003-09-10 21:13 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_static_stream/gcc/release/bench_format_static_stream
printf time         :2.1
ostream time        : 2.79,  = 1.32857 * printf
stored format time  :  4.5,  = 2.14286 * printf ,  = 1.6129 * nullStream
format time         :10.05,  = 4.78571 * printf ,  = 3.60215 * nullStream

-- Variant  ** _basicfmt ** :
-rwx--x--x    1 sam      users       47200 2003-09-10 21:13 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_basicfmt/gcc/release/bench_format_basicfmt
printf time         :2.22
ostream time        : 2.88,  = 1.2973 * printf
stored format time  : 4.45,  = 2.0045 * printf ,  = 1.54514 * nullStream
format time         :11.67,  = 5.25676 * printf ,  = 4.05208 * nullStream





The cost of imbuing locale after each object is fed :

------------------- Compiler  gcc : ----------------
-- Variant  _normal :
-rwx--x--x    1 sam      users       49920 2003-09-10 20:23 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_normal/gcc/release/bench_format_normal
printf time         :2.21
ostream time        :  3.1,  = 1.40271 * printf
stored format time  :11.53,  = 3.71935 * stream
format time         :18.86,  = 6.08387 * stream

-- Variant  _static_stream :
-rwx--x--x    1 sam      users       43232 2003-09-10 20:24 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_static_stream/gcc/release/bench_format_static_stream
printf time         :2.19
ostream time        : 3.09,  = 1.41096 * printf
stored format time  : 4.63,  = 1.49838 * stream
format time         :10.12,  = 3.27508 * stream

-- Variant  _basicfmt :
-rwx--x--x    1 sam      users       45760 2003-09-10 20:24 /home/sam/progs/Boost/bin/BBoost//libs/format/benchmark/bench_format_basicfmt/gcc/release/bench_format_basicfmt
printf time         :2.23
ostream time        : 3.14,  = 1.40807 * printf
stored format time  : 4.61,  = 1.46815 * stream
format time         :11.33,  = 3.60828 * stream







------------------- Compiler  gcc : ----------------
-- Variant  _normal :
printf time         :2.15
ostream time        :4.42,  = 2.05581 * printf
stored format time  :5.85,  = 1.32353 * stream
format time         :11.53,  = 2.6086 * stream
-- Variant  _no_reuse_stream :
printf time         :2.13
ostream time        :4.4,  = 2.06573 * printf
stored format time  :11.1,  = 2.52273 * stream
format time         :14.3,  = 3.25 * stream
-- Variant  _stringstr :
printf time         :2.01
ostream time        :4.42,  = 2.199 * printf
stored format time  :7.92,  = 1.79186 * stream
format time         :12.8,  = 2.89593 * stream

------------------- Compiler  intel-linux-7.1 : ----------------
-- Variant  _normal :
printf time         :2.08
ostream time        :4.49,  = 2.15865 * printf
stored format time  :5.3,  = 1.1804 * stream
format time         :17.8,  = 3.96437 * stream
-- Variant  _no_reuse_stream :
printf time         :2.09
ostream time        :4.37,  = 2.09091 * printf
stored format time  :10.07,  = 2.30435 * stream
format time         :14.46,  = 3.30892 * stream
-- Variant  _stringstr :
printf time         :1.99
ostream time        :5.16,  = 2.59296 * printf
stored format time  :5.83,  = 1.12984 * stream
format time         :17.42,  = 3.37597 * stream




// older Result with gcc-3.03 on linux :

// With flag -g :

/***
printf time         :1.2
ostream time        :2.84,  = 2.36667 * printf 
stored format time  :8.91,  = 3.13732 * stream 
format time         :15.35, = 5.40493 * stream 
format3 time        :21.83, = 7.68662 * stream 
***/


// With flag -O

/***
printf time         :1.16
ostream time        :1.94,  = 1.67241 * printf 
stored format time  :3.68,  = 1.89691 * stream 
format time         :6.31,  = 3.25258 * stream 
format3 time        :9.04,  = 4.65979 * stream 
***/

//  ==> that's quite acceptable.

// ------------------------------------------------------------------------------