diff options
Diffstat (limited to 'libs/conversion/perf/performance_test.cpp')
-rw-r--r-- | libs/conversion/perf/performance_test.cpp | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/libs/conversion/perf/performance_test.cpp b/libs/conversion/perf/performance_test.cpp new file mode 100644 index 0000000000..7fbac4ff4f --- /dev/null +++ b/libs/conversion/perf/performance_test.cpp @@ -0,0 +1,369 @@ +// (C) Copyright Antony Polukhin 2012. +// Use, modification and distribution are subject to 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) + +// See http://www.boost.org/libs/config for most recent version. + +// +// Testing lexical_cast<> performance +// + +#define BOOST_ERROR_CODE_HEADER_ONLY +#define BOOST_CHRONO_HEADER_ONLY + +#include <boost/lexical_cast.hpp> + +#include <boost/chrono.hpp> +#include <fstream> +#include <cstring> +#include <boost/container/string.hpp> + +// File to output data +std::fstream fout; + +namespace boost { +inline std::istream& operator>> (std::istream& in, boost::array<char,50>& res) { + in >> res.begin(); + return in; +} +} + +template <class OutT, class InT> +static inline void test_lexical(const InT& in_val) { + OutT out_val = boost::lexical_cast<OutT>(in_val); + (void)out_val; +} + +template <class OutT, class InT> +static inline void test_ss_constr(const InT& in_val) { + OutT out_val; + std::stringstream ss; + ss << in_val; + if (ss.fail()) throw std::logic_error("descr"); + ss >> out_val; + if (ss.fail()) throw std::logic_error("descr"); +} + +template <class OutT, class CharT, std::size_t N> +static inline void test_ss_constr(const boost::array<CharT, N>& in_val) { + OutT out_val; + std::stringstream ss; + ss << in_val.begin(); + if (ss.fail()) throw std::logic_error("descr"); + ss >> out_val; + if (ss.fail()) throw std::logic_error("descr"); +} + +template <class OutT, class StringStreamT, class CharT, std::size_t N> +static inline void test_ss_noconstr(StringStreamT& ss, const boost::array<CharT, N>& in_val) { + OutT out_val; + ss << in_val.begin(); // ss is an instance of std::stringstream + if (ss.fail()) throw std::logic_error("descr"); + ss >> out_val; + if (ss.fail()) throw std::logic_error("descr"); + /* reseting std::stringstream to use it again */ + ss.str(std::string()); + ss.clear(); +} + +template <class OutT, class StringStreamT, class InT> +static inline void test_ss_noconstr(StringStreamT& ss, const InT& in_val) { + OutT out_val; + ss << in_val; // ss is an instance of std::stringstream + if (ss.fail()) throw std::logic_error("descr"); + ss >> out_val; + if (ss.fail()) throw std::logic_error("descr"); + /* reseting std::stringstream to use it again */ + ss.str(std::string()); + ss.clear(); +} + +struct structure_sprintf { + template <class OutT, class BufferT, class InT> + static inline void test(BufferT* buffer, const InT& in_val, const char* const conv) { + sprintf(buffer, conv, in_val); + OutT out_val(buffer); + } + + template <class OutT, class BufferT> + static inline void test(BufferT* buffer, const std::string& in_val, const char* const conv) { + sprintf(buffer, conv, in_val.c_str()); + OutT out_val(buffer); + } +}; + +struct structure_sscanf { + template <class OutT, class BufferT, class CharT, std::size_t N> + static inline void test(BufferT* /*buffer*/, const boost::array<CharT, N>& in_val, const char* const conv) { + OutT out_val; + sscanf(in_val.cbegin(), conv, &out_val); + } + + template <class OutT, class BufferT, class InT> + static inline void test(BufferT* /*buffer*/, const InT& in_val, const char* const conv) { + OutT out_val; + sscanf(reinterpret_cast<const char*>(in_val), conv, &out_val); + } + + template <class OutT, class BufferT> + static inline void test(BufferT* /*buffer*/, const std::string& in_val, const char* const conv) { + OutT out_val; + sscanf(in_val.c_str(), conv, &out_val); + } + + template <class OutT, class BufferT> + static inline void test(BufferT* /*buffer*/, const boost::iterator_range<const char*>& in_val, const char* const conv) { + OutT out_val; + sscanf(in_val.begin(), conv, &out_val); + } +}; + +struct structure_fake { + template <class OutT, class BufferT, class InT> + static inline void test(BufferT* /*buffer*/, const InT& /*in_val*/, const char* const /*conv*/) {} +}; + +static const int fake_test_value = 9999; + +template <class T> +static inline void min_fancy_output(T v1, T v2, T v3, T v4) { + const char beg_mark[] = "!!! *"; + const char end_mark[] = "* !!!"; + const char no_mark[] = ""; + + unsigned int res = 4; + if (v1 < v2 && v1 < v3 && v1 < v4) res = 1; + if (v2 < v1 && v2 < v3 && v2 < v4) res = 2; + if (v3 < v1 && v3 < v2 && v3 < v4) res = 3; + + fout << "[ " + << (res == 1 ? beg_mark : no_mark) + ; + + if (v1) fout << v1; + else fout << "<1"; + + fout << (res == 1 ? end_mark : no_mark) + << " ][ " + << (res == 2 ? beg_mark : no_mark) + ; + + if (v2) fout << v2; + else fout << "<1"; + + fout << (res == 2 ? end_mark : no_mark) + << " ][ " + << (res == 3 ? beg_mark : no_mark) + ; + + if (v3) fout << v3; + else fout << "<1"; + + fout << (res == 3 ? end_mark : no_mark) + << " ][ " + << (res == 4 ? beg_mark : no_mark) + ; + + if (!v4) fout << "<1"; + else if (v4 == fake_test_value) fout << "---"; + else fout << v4; + + fout + << (res == 4 ? end_mark : no_mark) + << " ]"; +} + +template <unsigned int IetartionsCountV, class ToT, class SprintfT, class FromT> +static inline void perf_test_impl(const FromT& in_val, const char* const conv) { + + typedef boost::chrono::steady_clock test_clock; + test_clock::time_point start; + typedef boost::chrono::milliseconds duration_t; + duration_t lexical_cast_time, ss_constr_time, ss_noconstr_time, printf_time; + + start = test_clock::now(); + for (unsigned int i = 0; i < IetartionsCountV; ++i) { + test_lexical<ToT>(in_val); + test_lexical<ToT>(in_val); + test_lexical<ToT>(in_val); + test_lexical<ToT>(in_val); + } + lexical_cast_time = boost::chrono::duration_cast<duration_t>(test_clock::now() - start); + + + start = test_clock::now(); + for (unsigned int i = 0; i < IetartionsCountV; ++i) { + test_ss_constr<ToT>(in_val); + test_ss_constr<ToT>(in_val); + test_ss_constr<ToT>(in_val); + test_ss_constr<ToT>(in_val); + } + ss_constr_time = boost::chrono::duration_cast<duration_t>(test_clock::now() - start); + + std::stringstream ss; + start = test_clock::now(); + for (unsigned int i = 0; i < IetartionsCountV; ++i) { + test_ss_noconstr<ToT>(ss, in_val); + test_ss_noconstr<ToT>(ss, in_val); + test_ss_noconstr<ToT>(ss, in_val); + test_ss_noconstr<ToT>(ss, in_val); + } + ss_noconstr_time = boost::chrono::duration_cast<duration_t>(test_clock::now() - start); + + + char buffer[128]; + start = test_clock::now(); + for (unsigned int i = 0; i < IetartionsCountV; ++i) { + SprintfT::template test<ToT>(buffer, in_val, conv); + SprintfT::template test<ToT>(buffer, in_val, conv); + SprintfT::template test<ToT>(buffer, in_val, conv); + SprintfT::template test<ToT>(buffer, in_val, conv); + } + printf_time = boost::chrono::duration_cast<duration_t>(test_clock::now() - start); + + min_fancy_output( + lexical_cast_time.count(), + ss_constr_time.count(), + ss_noconstr_time.count(), + boost::is_same<SprintfT, structure_fake>::value ? fake_test_value : printf_time.count() + ); +} + +template <class ToT, class SprintfT, class FromT> +static inline void perf_test(const std::string& test_name, const FromT& in_val, const char* const conv) { + const unsigned int ITERATIONSCOUNT = 100000; + fout << " [[ " << test_name << " ]"; + + perf_test_impl<ITERATIONSCOUNT/4, ToT, SprintfT>(in_val, conv); + + fout << "]\n"; +} + + +template <class ConverterT> +void string_like_test_set(const std::string& from) { + typedef structure_sscanf ssc_t; + ConverterT conv; + + perf_test<char, ssc_t>(from + "->char", conv("c"), "%c"); + perf_test<signed char, ssc_t>(from + "->signed char", conv("c"), "%hhd"); + perf_test<unsigned char, ssc_t>(from + "->unsigned char", conv("c"), "%hhu"); + + perf_test<int, ssc_t>(from + "->int", conv("100"), "%d"); + perf_test<short, ssc_t>(from + "->short", conv("100"), "%hd"); + perf_test<long int, ssc_t>(from + "->long int", conv("100"), "%ld"); + perf_test<boost::long_long_type, ssc_t>(from + "->long long", conv("100"), "%lld"); + + perf_test<unsigned int, ssc_t>(from + "->unsigned int", conv("100"), "%u"); + perf_test<unsigned short, ssc_t>(from + "->unsigned short", conv("100"), "%hu"); + perf_test<unsigned long int, ssc_t>(from + "->unsigned long int", conv("100"), "%lu"); + perf_test<boost::ulong_long_type, ssc_t>(from + "->unsigned long long", conv("100"), "%llu"); + + // perf_test<bool, ssc_t>(from + "->bool", conv("1"), "%"); + + perf_test<float, ssc_t>(from + "->float", conv("1.123"), "%f"); + perf_test<double, ssc_t>(from + "->double", conv("1.123"), "%lf"); + perf_test<long double, ssc_t>(from + "->long double", conv("1.123"), "%Lf"); + perf_test<boost::array<char, 50>, ssc_t>(from + "->array<char, 50>", conv("1.123"), "%s"); + + perf_test<std::string, structure_fake>(from + "->string", conv("string"), "%Lf"); + perf_test<boost::container::string, structure_fake>(from + "->container::string" + , conv("string"), "%Lf"); + +} + +struct to_string_conv { + std::string operator()(const char* const c) const { + return c; + } +}; + +struct to_char_conv { + const char* operator()(const char* const c) const { + return c; + } +}; + +struct to_uchar_conv { + const unsigned char* operator()(const char* const c) const { + return reinterpret_cast<const unsigned char*>(c); + } +}; + + +struct to_schar_conv { + const signed char* operator()(const char* const c) const { + return reinterpret_cast<const signed char*>(c); + } +}; + +struct to_iterator_range { + boost::iterator_range<const char*> operator()(const char* const c) const { + return boost::make_iterator_range(c, c + std::strlen(c)); + } +}; + +struct to_array_50 { + boost::array<char, 50> operator()(const char* const c) const { + boost::array<char, 50> ret; + std::strcpy(ret.begin(), c); + return ret; + } +}; + +int main(int argc, char** argv) { + BOOST_ASSERT(argc >= 2); + std::string output_path(argv[1]); + output_path += "/results.txt"; + fout.open(output_path.c_str(), std::fstream::in | std::fstream::out | std::fstream::app); + BOOST_ASSERT(fout); + + fout << "[section " << BOOST_COMPILER << "]\n" + << "[table:id Performance Table ( "<< BOOST_COMPILER << ")\n" + << "[[From->To] [lexical_cast] [std::stringstream with construction] " + << "[std::stringstream without construction][scanf/printf]]\n"; + + + // From std::string to ... + string_like_test_set<to_string_conv>("string"); + + // From ... to std::string + perf_test<std::string, structure_sprintf>("string->char", 'c', "%c"); + perf_test<std::string, structure_sprintf>("string->signed char", static_cast<signed char>('c'), "%hhd"); + perf_test<std::string, structure_sprintf>("string->unsigned char", static_cast<unsigned char>('c'), "%hhu"); + + perf_test<std::string, structure_sprintf>("int->string", 100, "%d"); + perf_test<std::string, structure_sprintf>("short->string", static_cast<short>(100), "%hd"); + perf_test<std::string, structure_sprintf>("long int->string", 100l, "%ld"); + perf_test<std::string, structure_sprintf>("long long->string", 100ll, "%lld"); + + perf_test<std::string, structure_sprintf>("unsigned int->string", static_cast<unsigned short>(100u), "%u"); + perf_test<std::string, structure_sprintf>("unsigned short->string", 100u, "%hu"); + perf_test<std::string, structure_sprintf>("unsigned long int->string", 100ul, "%lu"); + perf_test<std::string, structure_sprintf>("unsigned long long->string", static_cast<boost::ulong_long_type>(100), "%llu"); + + // perf_test<bool, structure_sscanf>("bool->string", std::string("1"), "%"); + + perf_test<std::string, structure_sprintf>("float->string", 1.123f, "%f"); + perf_test<std::string, structure_sprintf>("double->string", 1.123, "%lf"); + perf_test<std::string, structure_sprintf>("long double->string", 1.123L, "%Lf"); + + + string_like_test_set<to_char_conv>("char*"); + string_like_test_set<to_uchar_conv>("unsigned char*"); + string_like_test_set<to_schar_conv>("signed char*"); + string_like_test_set<to_iterator_range>("iterator_range<char*>"); + string_like_test_set<to_array_50>("array<char, 50>"); + + perf_test<int, structure_fake>("int->int", 100, ""); + perf_test<double, structure_fake>("float->double", 100.0f, ""); + perf_test<signed char, structure_fake>("char->signed char", 'c', ""); + + + fout << "]\n" + << "[endsect]\n\n"; + return 0; +} + + |