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// Copyright (c) 2002-2010 Hartmut Kaiser
// Copyright (c) 2002-2010 Joel de Guzman
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <boost/spirit/include/karma.hpp>
#include <boost/format.hpp>
#include <iostream>
#include "../high_resolution_timer.hpp"
#define NUMITERATIONS 1000000
///////////////////////////////////////////////////////////////////////////////
// We generate plain floating point numbers in this test
//[karma_double_performance_definitions
using boost::spirit::karma::double_;
//]
void format_performance_karma()
{
using boost::spirit::karma::generate;
//[karma_double_performance_plain
char buffer[256];
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i) {
char *p = buffer;
generate(p, double_, 12345.12345);
*p = '\0';
}
//]
std::cout << "karma:\t\t" << t.elapsed() << std::endl;
// std::cout << buffer << std::endl;
}
void format_performance_rule()
{
using boost::spirit::karma::generate;
boost::spirit::karma::rule<char*, double()> r;
//[karma_double_performance_rule
char buffer[256];
r %= double_;
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i) {
char *p = buffer;
generate(p, r, 12345.12345);
*p = '\0';
}
//]
std::cout << "karma (rule):\t" << t.elapsed() << std::endl;
// std::cout << buffer << std::endl;
}
void format_performance_direct()
{
using boost::spirit::karma::generate;
using boost::spirit::karma::real_inserter;
//[karma_double_performance_direct
typedef real_inserter<double> inserter;
char buffer[256];
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i) {
char *p = buffer;
inserter::call(p, 12345.12345);
*p = '\0';
}
//]
std::cout << "karma (direct):\t" << t.elapsed() << std::endl;
// std::cout << buffer << std::endl;
}
void format_performance_string()
{
using boost::spirit::karma::generate;
//[karma_double_performance_string
std::string generated;
std::back_insert_iterator<std::string> sink(generated);
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i) {
generated.clear();
generate(sink, double_, 12345.12345);
}
//]
std::cout << "karma (string):\t" << t.elapsed() << std::endl;
// std::cout << generated << std::endl;
}
// Boost.Format
void format_performance_boost_format()
{
//[karma_double_performance_format
std::string generated;
boost::format double_format("%f");
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i)
generated = boost::str(double_format % 12345.12345);
//]
std::cout << "format:\t\t" << t.elapsed() << std::endl;
// std::cout << strm.str() << std::endl;
}
void format_performance_sprintf()
{
util::high_resolution_timer t;
//[karma_double_performance_printf
char buffer[256];
for (int i = 0; i < NUMITERATIONS; ++i) {
sprintf(buffer, "%f", 12345.12345);
}
//]
std::cout << "sprintf:\t" << t.elapsed() << std::endl;
// std::cout << buffer << std::endl;
}
void format_performance_iostreams()
{
//[karma_double_performance_iostreams
std::stringstream strm;
//<-
util::high_resolution_timer t;
//->
for (int i = 0; i < NUMITERATIONS; ++i) {
strm.str("");
strm << 12345.12345;
}
//]
std::cout << "iostreams:\t" << t.elapsed() << std::endl;
// std::cout << strm.str() << std::endl;
}
///////////////////////////////////////////////////////////////////////////////
int main()
{
format_performance_sprintf();
format_performance_iostreams();
format_performance_boost_format();
format_performance_karma();
format_performance_string();
format_performance_rule();
format_performance_direct();
return 0;
}
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