Direct-BT v3.3.0-1-gc2d430c
Direct-BT - Direct Bluetooth Programming.
test_functional_perf.hpp

This C++ unit test benchmarks the jau::function<R(A...)> and all its jau::func::target_t specializations.

This C++ unit test benchmarks the jau::function<R(A...)> and all its jau::func::target_t specializations.

/*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2022 Gothel Software e.K.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
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* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <cassert>
#include <cinttypes>
#include <cstring>
#include <string>
#if !FUNCTIONAL_PROVIDED
#include <jau/functional.hpp>
static std::string impl_name = "jau/functional.hpp";
#endif
#ifndef FUNCTIONAL_IMPL
#define FUNCTIONAL_IMPL 1
#endif
// Test examples.
public:
const int loops = 1000000;
/**
* Unit test covering most variants of jau::function<R(A...)
*/
void test00_usage() {
INFO("Test 00_usage: START: Implementation = functional "+std::to_string( FUNCTIONAL_IMPL ));
fprintf(stderr, "Implementation: functional %d, is_rtti_available %d, limited_lambda_id %d\n",
{
// Test capturing lambdas
volatile int i = 100;
{
jau::function<int(int)> fa0 = [&](int a) -> int {
return i + a;
};
fprintf(stderr, "lambda.ref: %s\n", fa0.toString().c_str());
REQUIRE( jau::func::target_type::lambda == fa0.type() );
}
{
jau::function<int(int)> fa0 = [i](int a) -> int {
return i + a;
};
fprintf(stderr, "lambda.copy: %s\n", fa0.toString().c_str());
REQUIRE( jau::func::target_type::lambda == fa0.type() );
}
}
{
// Test non-capturing lambdas
jau::function<int(int)> f_1 = [](int a) -> int {
return a + 100;
} ;
fprintf(stderr, "lambda.plain: %s\n", f_1.toString().c_str());
REQUIRE( jau::func::target_type::lambda == f_1.type() );
}
#if ( FUNCTIONAL_IMPL == 1 )
{
// Test non-capturing y-lambdas, using auto
jau::function<int(int)> f_1 = jau::function<int(int)>::bind_ylambda( [](auto& self, int x) -> int {
if( 0 == x ) {
return 1;
} else {
return x * self(x-1);
}
} );
fprintf(stderr, "ylambda.plain1 %s\n", f_1.toString().c_str());
REQUIRE( jau::func::target_type::ylambda == f_1.type() );
}
{
// Test non-capturing y-lambdas, using explicit function<int(int)>::delegate_type
jau::function<int(int)> f_1 = jau::function<int(int)>::bind_ylambda( [](jau::function<int(int)>::delegate_type& self, int x) -> int {
if( 0 == x ) {
return 1;
} else {
return x * self(x-1);
}
} );
fprintf(stderr, "ylambda.plain2 %s\n", f_1.toString().c_str());
REQUIRE( jau::func::target_type::ylambda == f_1.type() );
}
#endif
{
// free, result void and no params
typedef void(*cfunc)();
jau::function<void()> fl_0 = (cfunc) ( []() -> void {
// nop
} );
fprintf(stderr, "freeA.0 %s\n", fl_0.toString().c_str());
REQUIRE( jau::func::target_type::free == fl_0.type() );
}
{
// member, result non-void
jau::function<int(int)> f2a_0(this, &TestFunction01::func02a_member);
fprintf(stderr, "member: %s\n", f2a_0.toString().c_str());
REQUIRE( jau::func::target_type::member == f2a_0.type() );
}
{
// member, result void
jau::function<void(int&, int)> f2a_0(this, &TestFunction01::func12a_member);
fprintf(stderr, "member: %s\n", f2a_0.toString().c_str());
REQUIRE( jau::func::target_type::member == f2a_0.type() );
}
{
// Lambda alike w/ explicit capture by value, result non-void
int offset100 = 100;
typedef int(*cfunc)(int&, int); // to force non-capturing lambda into a free function template type deduction
jau::function<int(int)> f5_o100_1 = jau::bind_capval(offset100,
(cfunc) ( [](int& capture, int i)->int {
int res = i+10000+capture;
return res;
} ) );
fprintf(stderr, "capval.small: %s\n", f5_o100_1.toString().c_str());
}
{
// Lambda alike w/ explicit capture by value, result non-void
struct blob {
int offset100 = 100;
uint64_t lala0 = 0;
uint64_t lala1 = 1;
uint64_t lala2 = 2;
uint64_t lala3 = 3;
bool operator==(const blob& rhs) const noexcept {
return offset100 == rhs.offset100 &&
lala0 == rhs.lala0 &&
lala1 == rhs.lala1 &&
lala2 == rhs.lala2 &&
lala3 == rhs.lala3;
}
bool operator!=(const blob& rhs) const noexcept
{ return !( *this == rhs ); }
};
blob b0;
typedef int(*cfunc)(blob&, int); // to force non-capturing lambda into a free function template type deduction
jau::function<int(int)> f5_o100_1 = jau::bind_capval(b0,
(cfunc) ( [](blob& capture, int i)->int {
int res = i+10000+capture.offset100;
return res;
} ) );
fprintf(stderr, "capval.big: %s\n", f5_o100_1.toString().c_str());
}
{
// Lambda alike w/ explicit capture by reference, result non-void
int offset100 = 100;
typedef int(*cfunc)(int*, int); // to force non-capturing lambda into a free function template type deduction
jau::function<int(int)> f7_o100_1 = jau::bind_capref<int, int, int>(&offset100,
(cfunc) ( [](int* capture, int i)->int {
int res = i+10000+(*capture);
return res;;
} ) );
fprintf(stderr, "capref: %s\n", f7_o100_1.toString().c_str());
REQUIRE( jau::func::target_type::capref == f7_o100_1.type() );
}
{
// std::function lambda plain
std::function<int(int i)> func4a_stdlambda = [](int i)->int {
int res = i+100;
return res;;
};
jau::function<int(int)> f = jau::bind_std(100, func4a_stdlambda);
fprintf(stderr, "std.lambda pl: %s\n", f.toString().c_str());
fprintf(stderr, " (net std.lambda): sizeof %zu\n", sizeof(func4a_stdlambda));
REQUIRE( jau::func::target_type::std == f.type() );
}
{
// std::function lambda capture
volatile int i = 100;
std::function<int(int)> func4a_stdlambda = [&](int a) -> int {
return i + a;
};
jau::function<int(int)> f = jau::bind_std(100, func4a_stdlambda);
fprintf(stderr, "std.lambda cp: %s\n", f.toString().c_str());
fprintf(stderr, " (net std.lambda): sizeof %zu\n", sizeof(func4a_stdlambda));
}
}
void test10_perf() {
INFO("Test 00_usage: START");
// free raw func
{
BENCHMARK("free_rawfunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + TestFunction01::Func03a_static(i);
}
return r;
};
}
// free native function pointer
{
native_func_t f = TestFunction01::Func03a_static;
BENCHMARK("free_cfuncptr") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// free std::function
{
std::function<int(int)> f = TestFunction01::Func03a_static;
BENCHMARK("free_stdfunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// free, jau::function
{
jau::function<int(int)> f = jau::bind_free(&TestFunction01::Func03a_static);
BENCHMARK("free_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// member raw function
{
BENCHMARK("member_rawfunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + func02a_member(i);
}
return r;
};
}
// member std::bind unspecific
{
using namespace std::placeholders; // for _1, _2, _3...
auto f = std::bind(&TestFunction01::func02a_member, this, _1);
BENCHMARK("member_stdbind_unspec") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// member jau::function
{
jau::function<int(int)> f = jau::bind_member(this, &TestFunction01::func02a_member);
BENCHMARK("member_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// lambda w/ explicit capture by value, jau::function
{
int offset100 = 100;
int(*func5a_capture)(int&, int) = [](int& capture, int i)->int {
int res = i+capture;
return res;
};
jau::function<int(int)> f = jau::bind_capval(offset100, func5a_capture);
BENCHMARK("capval_small_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
{
// Lambda alike w/ explicit capture by value, result non-void
struct blob {
int offset100 = 100;
uint64_t lala0 = 0;
uint64_t lala1 = 1;
uint64_t lala2 = 2;
uint64_t lala3 = 3;
bool operator==(const blob& rhs) const noexcept {
return offset100 == rhs.offset100 &&
lala0 == rhs.lala0 &&
lala1 == rhs.lala1 &&
lala2 == rhs.lala2 &&
lala3 == rhs.lala3;
}
bool operator!=(const blob& rhs) const noexcept
{ return !( *this == rhs ); }
};
blob b0;
typedef int(*cfunc)(blob&, int); // to force non-capturing lambda into a free function template type deduction
jau::function<int(int)> f = jau::bind_capval(b0,
(cfunc) ( [](blob& capture, int i)->int {
int res = i+10000+capture.offset100;
return res;
} ) );
BENCHMARK("capval_big_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// lambda w/ explicit capture by reference, jau::function
{
int offset100 = 100;
int(*func7a_capture)(int*, int) = [](int* capture, int i)->int {
int res = i+*capture;
return res;
};
jau::function<int(int)> f = jau::bind_capref(&offset100, func7a_capture);
BENCHMARK("capref_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// plain std::function lambda
{
std::function<int(int i)> f = [](int i)->int {
int res = i+100;
return res;;
};
BENCHMARK("lambda_plain_std_function") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// plain jau::function lambda
{
jau::function<int(int)> f = [](int a) -> int {
return 100+ a;
};
BENCHMARK("lambda_plain_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// capture std::function lambda
{
volatile int captured = 100;
std::function<int(int)> f = [&](int a) -> int {
return captured + a;
};
BENCHMARK("lambda_capt_std_function") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
// capture jau::function lambda
{
volatile int captured = 100;
jau::function<int(int)> f = [&](int a) -> int {
return captured + a;
};
BENCHMARK("lambda_capt_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
#if ( FUNCTIONAL_IMPL == 1 )
{
jau::function<int(int)> f = jau::function<int(int)>::bind_ylambda( [](auto& self, int x) -> int {
(void)self; // no-use
return 100+x;
} );
BENCHMARK("ylambda_none_jaufunc") {
volatile int r=0;
for(int i=0; i<loops; ++i) {
r = r + f(i);
}
return r;
};
}
#endif
REQUIRE( true == true );
INFO("Test 00_usage: END");
}
private:
typedef int(*native_func_t)(int);
typedef std::function<int(int)> std_func_t;
typedef jau::function<int(int)> jau_func_t;
// template<typename R, typename... A>
typedef int(*MyCFunc0)(int);
typedef jau::function<int(int)> MyClassFunction0;
typedef jau::function<void(int&, int)> MyClassFunction1;
typedef jau::function<void()> MyClassFunction2;
int func02a_member(int i) {
int res = i+100;
return res;;
}
int func02b_member(int i) noexcept {
int res = i+1000;
return res;
}
static int Func03a_static(int i) {
int res = i+100;
return res;
}
static int Func03b_static(int i) noexcept {
int res = i+1000;
return res;
}
void func12a_member(int& r, const int i) {
r = i+100;
}
void func12b_member(int& r, const int i) noexcept {
r = i+1000;
}
static void Func13a_static(int& r, const int i) {
r = i+100;
}
static void Func13b_static(int& r, const int i) noexcept {
r = i+1000;
}
void func20a_member() {
// nop
}
static void Func20a_static() {
// nop
}
static jau::function<int(int)> lambda_01() {
static int i = 100;
jau::function<int(int)> f = [&](int a) -> int {
return i + a;
};
return f;
}
static jau::function<int(int)> lambda_02() {
int i = 100;
jau::function<int(int)> f = [i](int a) -> int {
return i + a;
};
return f;
}
};
void test00_usage()
Unit test covering most variants of jau::function<R(A...)
Class template jau::function is a general-purpose static-polymorphic function wrapper.
static constexpr const bool limited_lambda_id
Static constexpr boolean indicating whether resulting type_info uniqueness is limited for lambda func...
bool operator!=(const alphabet &lhs, const alphabet &rhs) noexcept
Definition: base_codec.hpp:99
std::string to_string(const alphabet &v) noexcept
Definition: base_codec.hpp:97
bool operator==(const alphabet &lhs, const alphabet &rhs) noexcept
Definition: base_codec.hpp:103
consteval_cxx20 bool is_rtti_available() noexcept
Returns true if compiled with RTTI available.
jau::function< R(A...)> bind_member(C1 *base, R(C0::*mfunc)(A...)) noexcept
Bind given class instance and non-void member function to an anonymous function using func_member_tar...
jau::function< R(A...)> bind_free(R(*func)(A...)) noexcept
Bind given non-void free-function to an anonymous function using func::free_target_t.
jau::function< R(A...)> bind_std(uint64_t id, std::function< R(A...)> func) noexcept
Bind given non-void std::function to an anonymous function using func::std_target_t.
jau::function< R(A...)> bind_capval(const I &data, R(*func)(I &, A...)) noexcept
Bind given data by copying the captured value and the given non-void function to an anonymous functio...
jau::function< R(A...)> bind_capref(I *data_ptr, R(*func)(I *, A...)) noexcept
Bind given data by passing the captured reference (pointer) to the value and non-void function to an ...
@ lambda
Denotes a func::lambda_target_t.
@ capref
Denotes a func::capref_target_t.
@ member
Denotes a func::member_target_t.
@ free
Denotes a func::free_target_t.
@ std
Denotes a func::std_target_t.
@ ylambda
Denotes a func::ylambda_target_t.
#define FUNCTIONAL_IMPL
METHOD_AS_TEST_CASE(TestFunction01::test00_usage, "00_usage")
static std::string impl_name