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#include <c10/util/intrusive_ptr.h>
#include <c10/util/irange.h>
#include <benchmark/benchmark.h>
#include <memory>
using c10::intrusive_ptr;
using c10::intrusive_ptr_target;
using c10::make_intrusive;
namespace {
// Foo uses intrusive ptr
class Foo : public intrusive_ptr_target {
public:
Foo(int param_) : param(param_) {}
int param;
};
class Bar : public std::enable_shared_from_this<Bar> {
public:
Bar(int param_) : param(param_) {}
int param;
};
static void BM_IntrusivePtrCtorDtor(benchmark::State& state) {
intrusive_ptr<Foo> var = make_intrusive<Foo>(0);
while (state.KeepRunning()) {
// NOLINTNEXTLINE(performance-unnecessary-copy-initialization)
volatile intrusive_ptr<Foo> var2 = var;
}
}
BENCHMARK(BM_IntrusivePtrCtorDtor);
static void BM_SharedPtrCtorDtor(benchmark::State& state) {
std::shared_ptr<Bar> var = std::make_shared<Bar>(0);
while (state.KeepRunning()) {
// NOLINTNEXTLINE(performance-unnecessary-copy-initialization)
volatile std::shared_ptr<Bar> var2 = var;
}
}
BENCHMARK(BM_SharedPtrCtorDtor);
static void BM_IntrusivePtrArray(benchmark::State& state) {
intrusive_ptr<Foo> var = make_intrusive<Foo>(0);
const size_t kLength = state.range(0);
std::vector<intrusive_ptr<Foo>> vararray(kLength);
while (state.KeepRunning()) {
for (const auto i : c10::irange(kLength)) {
vararray[i] = var;
}
for (const auto i : c10::irange(kLength)) {
vararray[i].reset();
}
}
}
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables,cppcoreguidelines-avoid-magic-numbers)
BENCHMARK(BM_IntrusivePtrArray)->RangeMultiplier(2)->Range(16, 4096);
static void BM_SharedPtrArray(benchmark::State& state) {
std::shared_ptr<Bar> var = std::make_shared<Bar>(0);
const size_t kLength = state.range(0);
std::vector<std::shared_ptr<Bar>> vararray(kLength);
while (state.KeepRunning()) {
for (const auto i : c10::irange(kLength)) {
vararray[i] = var;
}
for (const auto i : c10::irange(kLength)) {
vararray[i].reset();
}
}
}
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables,cppcoreguidelines-avoid-magic-numbers)
BENCHMARK(BM_SharedPtrArray)->RangeMultiplier(2)->Range(16, 4096);
static void BM_IntrusivePtrExclusiveOwnership(benchmark::State& state) {
while (state.KeepRunning()) {
volatile auto var = make_intrusive<Foo>(0);
}
}
BENCHMARK(BM_IntrusivePtrExclusiveOwnership);
static void BM_SharedPtrExclusiveOwnership(benchmark::State& state) {
while (state.KeepRunning()) {
volatile auto var = std::make_shared<Foo>(0);
}
}
BENCHMARK(BM_SharedPtrExclusiveOwnership);
} // namespace
BENCHMARK_MAIN();
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