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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "android-base/function_ref.h"
#include <benchmark/benchmark.h>
#include <functional>
#include <utility>
#include <time.h>
using android::base::function_ref;
template <class Callable, class... Args>
[[clang::noinline]] auto call(Callable&& c, Args&&... args) {
return c(std::forward<Args>(args)...);
}
[[clang::noinline]] static int testFunc(int, const char*, char) {
return time(nullptr);
}
using Func = decltype(testFunc);
static void BenchmarkFuncRaw(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(call(testFunc, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkFuncRaw);
static void BenchmarkFuncPtr(benchmark::State& state) {
auto ptr = &testFunc;
for (auto _ : state) {
benchmark::DoNotOptimize(call(ptr, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkFuncPtr);
static void BenchmarkStdFunction(benchmark::State& state) {
std::function<Func> f(testFunc);
for (auto _ : state) {
benchmark::DoNotOptimize(call(f, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkStdFunction);
static void BenchmarkFunctionRef(benchmark::State& state) {
function_ref<Func> f(testFunc);
for (auto _ : state) {
benchmark::DoNotOptimize(call(f, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkFunctionRef);
namespace {
struct BigFunc {
char big[128];
[[clang::noinline]] int operator()(int, const char*, char) const { return time(nullptr); }
};
static BigFunc bigFunc;
} // namespace
static void BenchmarkBigRaw(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(call(bigFunc, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkBigRaw);
static void BenchmarkBigStdFunction(benchmark::State& state) {
std::function<Func> f(bigFunc);
for (auto _ : state) {
benchmark::DoNotOptimize(call(f, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkBigStdFunction);
static void BenchmarkBigFunctionRef(benchmark::State& state) {
function_ref<Func> f(bigFunc);
for (auto _ : state) {
benchmark::DoNotOptimize(call(f, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkBigFunctionRef);
static void BenchmarkMakeFunctionRef(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(call<function_ref<Func>>(bigFunc, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkMakeFunctionRef);
static void BenchmarkMakeStdFunction(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(call<std::function<Func>>(bigFunc, 1, "1", '1'));
}
}
BENCHMARK(BenchmarkMakeStdFunction);
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