[DEV] add v1.76.0

libs/yap/perf/CMakeLists.txt

@@ -0,0 +1,56 @@
+include_directories(${CMAKE_HOME_DIRECTORY})
+
+
+macro(add_code_gen_executable name)
+    add_executable(${name} ${name}.cpp)
+    target_link_libraries(${name} yap)
+    if (clang_on_linux)
+        target_link_libraries(${name} c++)
+    endif ()
+endmacro()
+
+add_code_gen_executable(code_gen_samples)
+add_code_gen_executable(map_assign_code_gen)
+add_code_gen_executable(lazy_vector_perf)
+
+
+macro(add_perf_executable name)
+    add_executable(${name} ${name}.cpp)
+    add_dependencies(${name} benchmark)
+    target_link_libraries(${name} yap benchmark)
+    if (clang_on_linux)
+        target_link_libraries(${name} c++)
+    endif ()
+endmacro()
+
+add_perf_executable(map_assign_perf)
+add_perf_executable(arithmetic_perf)
+
+include(Disassemble)
+set(disassemble_dump_targets)
+foreach(fun eval_as_cpp_expr eval_as_yap_expr eval_as_cpp_expr_4x eval_as_yap_expr_4x)
+    disassemble(disassemble.arithmetic_perf.${fun} EXECUTABLE arithmetic_perf FUNCTION ${fun})
+    disassemble(disassemble.code_gen_samples.${fun} EXECUTABLE code_gen_samples FUNCTION ${fun})
+
+    add_custom_target(disass_dump.${fun}
+        COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target disassemble.arithmetic_perf.${fun}
+        COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target disassemble.code_gen_samples.${fun}
+    )
+    list(APPEND disassemble_dump_targets disass_dump.${fun})
+endforeach()
+
+foreach(fun get_d1_with_yap get_d1_by_hand update_v1_with_yap update_v1_by_hand)
+    disassemble(disassemble.lazy_vector_perf.${fun} EXECUTABLE lazy_vector_perf FUNCTION ${fun})
+
+    add_custom_target(disass_dump.${fun}
+        COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target disassemble.lazy_vector_perf.${fun}
+    )
+    list(APPEND disassemble_dump_targets disass_dump.${fun})
+endforeach()
+
+add_custom_target(perf
+    COMMAND map_assign_perf
+    COMMAND arithmetic_perf
+
+    DEPENDS ${disassemble_dump_targets}
+)

libs/yap/perf/arithmetic_perf.cpp

@@ -0,0 +1,141 @@
+// Copyright (C) 2016-2018 T. Zachary Laine
+//
+// 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/yap/expression.hpp>
+
+#include <chrono>
+#include <iostream>
+
+#include <benchmark/benchmark.h>
+
+
+template<typename T>
+using term = boost::yap::terminal<boost::yap::expression, T>;
+
+namespace yap = boost::yap;
+namespace bh = boost::hana;
+
+
+//[ arithmetic_perf_decls
+namespace user {
+
+    struct number
+    {
+        double value;
+
+        friend number operator+(number lhs, number rhs)
+        {
+            return number{lhs.value + rhs.value};
+        }
+
+        friend number operator*(number lhs, number rhs)
+        {
+            return number{lhs.value * rhs.value};
+        }
+    };
+}
+//]
+
+double get_noise()
+{
+    auto const start_time = std::chrono::high_resolution_clock::now();
+    auto const start_time_ns =
+        std::chrono::time_point_cast<std::chrono::nanoseconds>(start_time);
+    return 1.0 * start_time_ns.time_since_epoch().count();
+}
+
+
+user::number g_a{get_noise()};
+user::number g_x{get_noise()};
+user::number g_y{get_noise()};
+
+//[ arithmetic_perf_eval_as_yap_expr
+user::number eval_as_yap_expr(user::number a_, user::number x_, user::number y_)
+{
+    term<user::number> a{{a_}};
+    term<user::number> x{{x_}};
+    term<user::number> y{{y_}};
+    auto expr = (a * x + y) * (a * x + y) + (a * x + y);
+    return yap::evaluate(expr);
+}
+//]
+
+void BM_eval_as_yap_expr(benchmark::State & state)
+{
+    double d = 0;
+    while (state.KeepRunning()) {
+        user::number const n = eval_as_yap_expr(g_a, g_x, g_y);
+        d += n.value;
+    }
+    std::cout << "Sum of doubles=" << d << "\n";
+}
+
+//[ arithmetic_perf_eval_as_yap_expr_4x
+user::number
+eval_as_yap_expr_4x(user::number a_, user::number x_, user::number y_)
+{
+    term<user::number> a{{a_}};
+    term<user::number> x{{x_}};
+    term<user::number> y{{y_}};
+    auto expr = (a * x + y) * (a * x + y) + (a * x + y) +
+                (a * x + y) * (a * x + y) + (a * x + y) +
+                (a * x + y) * (a * x + y) + (a * x + y) +
+                (a * x + y) * (a * x + y) + (a * x + y);
+    return yap::evaluate(expr);
+}
+//]
+
+void BM_eval_as_yap_expr_4x(benchmark::State & state)
+{
+    double d = 0;
+    while (state.KeepRunning()) {
+        user::number const n = eval_as_yap_expr_4x(g_a, g_x, g_y);
+        d += n.value;
+    }
+    std::cout << "Sum of doubles=" << d << "\n";
+}
+
+//[ arithmetic_perf_eval_as_cpp_expr
+user::number eval_as_cpp_expr(user::number a, user::number x, user::number y)
+{
+    return (a * x + y) * (a * x + y) + (a * x + y);
+}
+//]
+
+void BM_eval_as_cpp_expr(benchmark::State & state)
+{
+    double d = 0;
+    while (state.KeepRunning()) {
+        user::number const n = eval_as_cpp_expr(g_a, g_x, g_y);
+        d += n.value;
+    }
+    std::cout << "Sum of doubles=" << d << "\n";
+}
+
+//[ arithmetic_perf_eval_as_cpp_expr_4x
+user::number eval_as_cpp_expr_4x(user::number a, user::number x, user::number y)
+{
+    return (a * x + y) * (a * x + y) + (a * x + y) + (a * x + y) * (a * x + y) +
+           (a * x + y) + (a * x + y) * (a * x + y) + (a * x + y) +
+           (a * x + y) * (a * x + y) + (a * x + y);
+}
+//]
+
+void BM_eval_as_cpp_expr_4x(benchmark::State & state)
+{
+    double d = 0;
+    while (state.KeepRunning()) {
+        user::number const n = eval_as_cpp_expr_4x(g_a, g_x, g_y);
+        d += n.value;
+    }
+    std::cout << "Sum of doubles=" << d << "\n";
+}
+
+BENCHMARK(BM_eval_as_yap_expr);
+BENCHMARK(BM_eval_as_yap_expr_4x);
+BENCHMARK(BM_eval_as_cpp_expr);
+BENCHMARK(BM_eval_as_cpp_expr_4x);
+
+BENCHMARK_MAIN();

libs/yap/perf/code_gen_samples.cpp

@@ -0,0 +1,99 @@
+// Copyright (C) 2016-2018 T. Zachary Laine
+//
+// 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/yap/expression.hpp>
+
+
+template<typename T>
+using term = boost::yap::terminal<boost::yap::expression, T>;
+
+namespace yap = boost::yap;
+namespace bh = boost::hana;
+
+
+namespace user {
+
+    struct number
+    {
+        double value;
+
+        friend number operator+(number lhs, number rhs)
+        {
+            return number{lhs.value + rhs.value};
+        }
+
+        friend number operator*(number lhs, number rhs)
+        {
+            return number{lhs.value * rhs.value};
+        }
+    };
+
+    // A more efficient fused multiply-add operation would normally go here.
+    number naxpy(number a, number x, number y)
+    {
+        return number{a.value * x.value + y.value};
+    }
+
+    // Transforms expressions of the form "a * x + y" to "naxpy(a, x, y)" via
+    // the implicit transform customiztion point.
+    template<typename Expr1, typename Expr2, typename Expr3>
+    decltype(auto) transform_expression(yap::expression<
+                                        yap::expr_kind::plus,
+                                        bh::tuple<
+                                            yap::expression<
+                                                yap::expr_kind::multiplies,
+                                                bh::tuple<Expr1, Expr2>>,
+                                            Expr3>> const & expr)
+    {
+        return naxpy(
+            evaluate(expr.left().left()),
+            evaluate(expr.left().right()),
+            evaluate(expr.right()));
+    }
+}
+
+term<user::number> a{{1.0}};
+term<user::number> x{{42.0}};
+term<user::number> y{{3.0}};
+
+user::number
+eval_as_yap_expr(decltype((a * x + y) * (a * x + y) + (a * x + y)) & expr)
+{
+    return yap::evaluate(expr);
+}
+
+user::number eval_as_yap_expr_4x(decltype(
+    (a * x + y) * (a * x + y) + (a * x + y) + (a * x + y) * (a * x + y) +
+    (a * x + y) + (a * x + y) * (a * x + y) + (a * x + y) +
+    (a * x + y) * (a * x + y) + (a * x + y)) & expr)
+{
+    return yap::evaluate(expr);
+}
+
+user::number eval_as_cpp_expr(user::number a, user::number x, user::number y)
+{
+    return (a * x + y) * (a * x + y) + (a * x + y);
+}
+
+user::number eval_as_cpp_expr_4x(user::number a, user::number x, user::number y)
+{
+    return (a * x + y) * (a * x + y) + (a * x + y) + (a * x + y) * (a * x + y) +
+           (a * x + y) + (a * x + y) * (a * x + y) + (a * x + y) +
+           (a * x + y) * (a * x + y) + (a * x + y);
+}
+
+
+int main()
+{
+    auto expr = (a * x + y) * (a * x + y) + (a * x + y);
+    user::number result_1 = eval_as_yap_expr(expr);
+    user::number result_2 =
+        eval_as_cpp_expr(yap::value(a), yap::value(x), yap::value(y));
+
+    (void)result_1;
+    (void)result_2;
+
+    return 0;
+}

libs/yap/perf/lazy_vector_perf.cpp

@@ -0,0 +1,151 @@
+// Copyright (C) 2016-2018 T. Zachary Laine
+//
+// 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)
+//[ lazy_vector
+// Defining this allows the assignment below of an expression to a double
+// without writing any specific code to do so.
+#include <boost/yap/expression.hpp>
+
+#include <algorithm>
+#include <cassert>
+#include <iostream>
+#include <vector>
+
+
+template<boost::yap::expr_kind Kind, typename Tuple>
+struct lazy_vector_expr;
+
+
+// This transform turns a terminal of std::vector<double> into a terminal
+// containing the nth double in that vector.  Think of it as turning our
+// expression of vectors into an expression of scalars.
+struct take_nth
+{
+    boost::yap::terminal<lazy_vector_expr, double> operator()(
+        boost::yap::terminal<lazy_vector_expr, std::vector<double>> const &
+            expr);
+
+    std::size_t n;
+};
+
+// A custom expression template that defines lazy + and - operators that
+// produce expressions, and an eager [] operator that returns the nth element
+// of the expression.
+//[ lazy_vector_decl
+template<boost::yap::expr_kind Kind, typename Tuple>
+struct lazy_vector_expr
+{
+    static const boost::yap::expr_kind kind = Kind;
+
+    Tuple elements;
+
+    // Note that this does not return an expression; it is greedily evaluated.
+    auto operator[](std::size_t n) const;
+};
+
+BOOST_YAP_USER_BINARY_OPERATOR(plus, lazy_vector_expr, lazy_vector_expr)
+BOOST_YAP_USER_BINARY_OPERATOR(minus, lazy_vector_expr, lazy_vector_expr)
+//]
+
+template<boost::yap::expr_kind Kind, typename Tuple>
+auto lazy_vector_expr<Kind, Tuple>::operator[](std::size_t n) const
+{
+    return boost::yap::evaluate(boost::yap::transform(*this, take_nth{n}));
+}
+
+boost::yap::terminal<lazy_vector_expr, double> take_nth::operator()(
+    boost::yap::terminal<lazy_vector_expr, std::vector<double>> const & expr)
+{
+    double x = boost::yap::value(expr)[n];
+    // This move is something of a hack.  The move indicates that the terminal
+    // should keep the value of x (since, being an rvalue, it may be a
+    // temporary), rather than a reference to x.  See the "How Expression
+    // Operands Are Treated" section of the tutorial for details.
+    return boost::yap::make_terminal<lazy_vector_expr, double>(std::move(x));
+}
+
+// In order to define the += operator with the semantics we want, it's
+// convenient to derive a terminal type from a terminal instantiation of
+// lazy_vector_expr.  note that we could have written a template
+// specialization here instead -- either one would work.  That would of course
+// have required more typing.
+struct lazy_vector : lazy_vector_expr<
+                         boost::yap::expr_kind::terminal,
+                         boost::hana::tuple<std::vector<double>>>
+{
+    lazy_vector() {}
+
+    explicit lazy_vector(std::vector<double> && vec)
+    {
+        elements = boost::hana::tuple<std::vector<double>>(std::move(vec));
+    }
+
+    template<boost::yap::expr_kind Kind, typename Tuple>
+    lazy_vector & operator+=(lazy_vector_expr<Kind, Tuple> const & rhs)
+    {
+        std::vector<double> & this_vec = boost::yap::value(*this);
+        for (int i = 0, size = (int)this_vec.size(); i < size; ++i) {
+            this_vec[i] += rhs[i];
+        }
+        return *this;
+    }
+};
+
+lazy_vector v1{std::vector<double>(4, 1.0)};
+lazy_vector v2{std::vector<double>(4, 2.0)};
+lazy_vector v3{std::vector<double>(4, 3.0)};
+
+double get_d1_with_yap()
+{
+    double retval = (v2 + v3)[2];
+    return retval;
+}
+
+double get_d1_by_hand()
+{
+    std::vector<double> & v2_ref = boost::yap::value(v2);
+    std::vector<double> & v3_ref = boost::yap::value(v3);
+    double retval = v2_ref[2] + v3_ref[2];
+    return retval;
+}
+
+void update_v1_with_yap() { v1 += v2 - v3; }
+
+void update_v1_by_hand()
+{
+    std::vector<double> & v1_ref = boost::yap::value(v1);
+    std::vector<double> & v2_ref = boost::yap::value(v2);
+    std::vector<double> & v3_ref = boost::yap::value(v3);
+    for (int i = 0, size = (int)v1_ref.size(); i < size; ++i) {
+        v1_ref[i] += v2_ref[i] - v3_ref[i];
+    }
+}
+
+int main()
+{
+    double d1_1 = get_d1_with_yap();
+    std::cout << d1_1 << "\n";
+
+    double d1_2 = get_d1_by_hand();
+    std::cout << d1_2 << "\n";
+
+    update_v1_with_yap();
+    std::cout << '{' << v1[0] << ',' << v1[1] << ',' << v1[2] << ',' << v1[3]
+              << '}' << "\n";
+
+    boost::yap::value(v1) = std::vector<double>(4, 1.0);
+
+    update_v1_by_hand();
+    std::cout << '{' << v1[0] << ',' << v1[1] << ',' << v1[2] << ',' << v1[3]
+              << '}' << "\n";
+
+    // This expression is disallowed because it does not conform to the
+    // implicit grammar.  operator+= is only defined on terminals, not
+    // arbitrary expressions.
+    // (v2 + v3) += v1;
+
+    return 0;
+}
+//]

libs/yap/perf/map_assign_code_gen.cpp

@@ -0,0 +1,149 @@
+// Copyright (C) 2016-2018 T. Zachary Laine
+//
+// 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/yap/expression.hpp>
+
+#include <boost/assign/list_of.hpp>
+
+#include <map>
+#include <iostream>
+
+
+template<typename Key, typename Value, typename Allocator>
+struct map_list_of_transform
+{
+    template<typename Fn, typename Key2, typename Value2>
+    auto operator()(
+        boost::yap::expr_tag<boost::yap::expr_kind::call>,
+        Fn const & fn,
+        Key2 && key,
+        Value2 && value)
+    {
+        boost::yap::transform(
+            boost::yap::as_expr<boost::yap::minimal_expr>(fn), *this);
+        map.emplace(
+            Key{std::forward<Key2 &&>(key)},
+            Value{std::forward<Value2 &&>(value)});
+        return 0;
+    }
+
+    std::map<Key, Value, Allocator> map;
+};
+
+
+template<boost::yap::expr_kind Kind, typename Tuple>
+struct map_list_of_expr
+{
+    static boost::yap::expr_kind const kind = Kind;
+
+    Tuple elements;
+
+    template<typename Key, typename Value, typename Allocator>
+    operator std::map<Key, Value, Allocator>() const
+    {
+        map_list_of_transform<Key, Value, Allocator> transform;
+        boost::yap::transform(*this, transform);
+        return transform.map;
+    }
+
+    BOOST_YAP_USER_CALL_OPERATOR(::map_list_of_expr)
+};
+
+struct map_list_of_tag
+{};
+
+auto map_list_of =
+    boost::yap::make_terminal<map_list_of_expr>(map_list_of_tag{});
+
+
+#if __GNUC__ || __clang__
+#define NOINLINE __attribute__((noinline))
+#else
+#define NOINLINE
+#endif
+
+
+NOINLINE std::map<std::string, int> make_map_with_boost_yap()
+{
+    return map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)("<>", 6);
+}
+
+
+NOINLINE std::map<std::string, int> make_map_with_boost_assign()
+{
+    return boost::assign::map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)(
+        "<>", 6);
+}
+
+
+NOINLINE std::map<std::string, int> make_map_manually()
+{
+    std::map<std::string, int> retval;
+    retval.emplace("<", 1);
+    retval.emplace("<=", 2);
+    retval.emplace(">", 3);
+    retval.emplace(">=", 4);
+    retval.emplace("=", 5);
+    retval.emplace("<>", 6);
+    return retval;
+}
+
+
+NOINLINE std::map<std::string, int> make_map_inializer_list()
+{
+    std::map<std::string, int> retval = {
+        {"<", 1}, {"<=", 2}, {">", 3}, {">=", 4}, {"=", 5}, {"<>", 6}};
+    return retval;
+}
+
+
+int main()
+{
+    {
+        std::map<std::string, int> op = make_map_with_boost_yap();
+
+        std::cout << "\"<\"  --> " << op["<"] << std::endl;
+        std::cout << "\"<=\" --> " << op["<="] << std::endl;
+        std::cout << "\">\"  --> " << op[">"] << std::endl;
+        std::cout << "\">=\" --> " << op[">="] << std::endl;
+        std::cout << "\"=\"  --> " << op["="] << std::endl;
+        std::cout << "\"<>\" --> " << op["<>"] << std::endl;
+    }
+
+    {
+        std::map<std::string, int> op = make_map_with_boost_assign();
+
+        std::cout << "\"<\"  --> " << op["<"] << std::endl;
+        std::cout << "\"<=\" --> " << op["<="] << std::endl;
+        std::cout << "\">\"  --> " << op[">"] << std::endl;
+        std::cout << "\">=\" --> " << op[">="] << std::endl;
+        std::cout << "\"=\"  --> " << op["="] << std::endl;
+        std::cout << "\"<>\" --> " << op["<>"] << std::endl;
+    }
+
+    {
+        std::map<std::string, int> op = make_map_manually();
+
+        std::cout << "\"<\"  --> " << op["<"] << std::endl;
+        std::cout << "\"<=\" --> " << op["<="] << std::endl;
+        std::cout << "\">\"  --> " << op[">"] << std::endl;
+        std::cout << "\">=\" --> " << op[">="] << std::endl;
+        std::cout << "\"=\"  --> " << op["="] << std::endl;
+        std::cout << "\"<>\" --> " << op["<>"] << std::endl;
+    }
+
+    {
+        std::map<std::string, int> op = make_map_inializer_list();
+
+        std::cout << "\"<\"  --> " << op["<"] << std::endl;
+        std::cout << "\"<=\" --> " << op["<="] << std::endl;
+        std::cout << "\">\"  --> " << op[">"] << std::endl;
+        std::cout << "\">=\" --> " << op[">="] << std::endl;
+        std::cout << "\"=\"  --> " << op["="] << std::endl;
+        std::cout << "\"<>\" --> " << op["<>"] << std::endl;
+    }
+
+    return 0;
+}

libs/yap/perf/map_assign_perf.cpp

@@ -0,0 +1,162 @@
+// Copyright (C) 2016-2018 T. Zachary Laine
+//
+// 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/yap/expression.hpp>
+
+#include <boost/assign/list_of.hpp>
+
+#include <map>
+#include <iostream>
+
+#include <benchmark/benchmark.h>
+
+
+template<typename Key, typename Value, typename Allocator>
+struct map_list_of_transform
+{
+    template<typename Fn, typename Key2, typename Value2>
+    auto operator()(
+        boost::yap::expr_tag<boost::yap::expr_kind::call>,
+        Fn const & fn,
+        Key2 && key,
+        Value2 && value)
+    {
+        boost::yap::transform(
+            boost::yap::as_expr<boost::yap::minimal_expr>(fn), *this);
+        map.emplace(
+            Key{std::forward<Key2 &&>(key)},
+            Value{std::forward<Value2 &&>(value)});
+        return 0;
+    }
+
+    std::map<Key, Value, Allocator> map;
+};
+
+
+template<boost::yap::expr_kind Kind, typename Tuple>
+struct map_list_of_expr
+{
+    static boost::yap::expr_kind const kind = Kind;
+
+    Tuple elements;
+
+    template<typename Key, typename Value, typename Allocator>
+    operator std::map<Key, Value, Allocator>() const
+    {
+        map_list_of_transform<Key, Value, Allocator> transform;
+        boost::yap::transform(*this, transform);
+        return transform.map;
+    }
+
+    BOOST_YAP_USER_CALL_OPERATOR(::map_list_of_expr)
+};
+
+struct map_list_of_tag
+{};
+
+auto map_list_of =
+    boost::yap::make_terminal<map_list_of_expr>(map_list_of_tag{});
+
+
+std::map<std::string, int> make_map_with_boost_yap()
+{
+    return map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)("<>", 6);
+}
+
+void BM_make_map_with_boost_yap(benchmark::State & state)
+{
+    int i = 0;
+    while (state.KeepRunning()) {
+        {
+            std::map<std::string, int> map = make_map_with_boost_yap();
+            state.PauseTiming();
+            for (auto && x : map) {
+                i += x.second;
+            }
+        }
+        state.ResumeTiming();
+    }
+    std::cout << "Sum of ints in all maps made=" << i << "\n";
+}
+
+std::map<std::string, int> make_map_with_boost_assign()
+{
+    return boost::assign::map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)(
+        "<>", 6);
+}
+
+void BM_make_map_with_boost_assign(benchmark::State & state)
+{
+    int i = 0;
+    while (state.KeepRunning()) {
+        {
+            std::map<std::string, int> map = make_map_with_boost_assign();
+            state.PauseTiming();
+            for (auto && x : map) {
+                i += x.second;
+            }
+        }
+        state.ResumeTiming();
+    }
+    std::cout << "Sum of ints in all maps made=" << i << "\n";
+}
+
+std::map<std::string, int> make_map_manually()
+{
+    std::map<std::string, int> retval;
+    retval.emplace("<", 1);
+    retval.emplace("<=", 2);
+    retval.emplace(">", 3);
+    retval.emplace(">=", 4);
+    retval.emplace("=", 5);
+    retval.emplace("<>", 6);
+    return retval;
+}
+
+void BM_make_map_manually(benchmark::State & state)
+{
+    int i = 0;
+    while (state.KeepRunning()) {
+        {
+            std::map<std::string, int> map = make_map_manually();
+            state.PauseTiming();
+            for (auto && x : map) {
+                i += x.second;
+            }
+        }
+        state.ResumeTiming();
+    }
+    std::cout << "Sum of ints in all maps made=" << i << "\n";
+}
+
+std::map<std::string, int> make_map_inializer_list()
+{
+    std::map<std::string, int> retval = {
+        {"<", 1}, {"<=", 2}, {">", 3}, {">=", 4}, {"=", 5}, {"<>", 6}};
+    return retval;
+}
+
+void BM_make_map_inializer_list(benchmark::State & state)
+{
+    int i = 0;
+    while (state.KeepRunning()) {
+        {
+            std::map<std::string, int> map = make_map_inializer_list();
+            state.PauseTiming();
+            for (auto && x : map) {
+                i += x.second;
+            }
+        }
+        state.ResumeTiming();
+    }
+    std::cout << "Sum of ints in all maps made=" << i << "\n";
+}
+
+BENCHMARK(BM_make_map_with_boost_yap);
+BENCHMARK(BM_make_map_with_boost_assign);
+BENCHMARK(BM_make_map_manually);
+BENCHMARK(BM_make_map_inializer_list);
+
+BENCHMARK_MAIN();