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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/config/warning_disable.hpp>
- #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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