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dawn-cmake/src/castable_bench.cc

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// Copyright 2022 The Tint Authors.
//
// 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 "bench/benchmark.h"
namespace tint {
namespace {
struct Base : public tint::Castable<Base> {};
struct A : public tint::Castable<A, Base> {};
struct AA : public tint::Castable<AA, A> {};
struct AAA : public tint::Castable<AAA, AA> {};
struct AAB : public tint::Castable<AAB, AA> {};
struct AAC : public tint::Castable<AAC, AA> {};
struct AB : public tint::Castable<AB, A> {};
struct ABA : public tint::Castable<ABA, AB> {};
struct ABB : public tint::Castable<ABB, AB> {};
struct ABC : public tint::Castable<ABC, AB> {};
struct AC : public tint::Castable<AC, A> {};
struct ACA : public tint::Castable<ACA, AC> {};
struct ACB : public tint::Castable<ACB, AC> {};
struct ACC : public tint::Castable<ACC, AC> {};
struct B : public tint::Castable<B, Base> {};
struct BA : public tint::Castable<BA, B> {};
struct BAA : public tint::Castable<BAA, BA> {};
struct BAB : public tint::Castable<BAB, BA> {};
struct BAC : public tint::Castable<BAC, BA> {};
struct BB : public tint::Castable<BB, B> {};
struct BBA : public tint::Castable<BBA, BB> {};
struct BBB : public tint::Castable<BBB, BB> {};
struct BBC : public tint::Castable<BBC, BB> {};
struct BC : public tint::Castable<BC, B> {};
struct BCA : public tint::Castable<BCA, BC> {};
struct BCB : public tint::Castable<BCB, BC> {};
struct BCC : public tint::Castable<BCC, BC> {};
struct C : public tint::Castable<C, Base> {};
struct CA : public tint::Castable<CA, C> {};
struct CAA : public tint::Castable<CAA, CA> {};
struct CAB : public tint::Castable<CAB, CA> {};
struct CAC : public tint::Castable<CAC, CA> {};
struct CB : public tint::Castable<CB, C> {};
struct CBA : public tint::Castable<CBA, CB> {};
struct CBB : public tint::Castable<CBB, CB> {};
struct CBC : public tint::Castable<CBC, CB> {};
struct CC : public tint::Castable<CC, C> {};
struct CCA : public tint::Castable<CCA, CC> {};
struct CCB : public tint::Castable<CCB, CC> {};
struct CCC : public tint::Castable<CCC, CC> {};
using AllTypes = std::tuple<Base,
A,
AA,
AAA,
AAB,
AAC,
AB,
ABA,
ABB,
ABC,
AC,
ACA,
ACB,
ACC,
B,
BA,
BAA,
BAB,
BAC,
BB,
BBA,
BBB,
BBC,
BC,
BCA,
BCB,
BCC,
C,
CA,
CAA,
CAB,
CAC,
CB,
CBA,
CBB,
CBC,
CC,
CCA,
CCB,
CCC>;
std::vector<std::unique_ptr<Base>> MakeObjects() {
std::vector<std::unique_ptr<Base>> out;
out.emplace_back(std::make_unique<Base>());
out.emplace_back(std::make_unique<A>());
out.emplace_back(std::make_unique<AA>());
out.emplace_back(std::make_unique<AAA>());
out.emplace_back(std::make_unique<AAB>());
out.emplace_back(std::make_unique<AAC>());
out.emplace_back(std::make_unique<AB>());
out.emplace_back(std::make_unique<ABA>());
out.emplace_back(std::make_unique<ABB>());
out.emplace_back(std::make_unique<ABC>());
out.emplace_back(std::make_unique<AC>());
out.emplace_back(std::make_unique<ACA>());
out.emplace_back(std::make_unique<ACB>());
out.emplace_back(std::make_unique<ACC>());
out.emplace_back(std::make_unique<B>());
out.emplace_back(std::make_unique<BA>());
out.emplace_back(std::make_unique<BAA>());
out.emplace_back(std::make_unique<BAB>());
out.emplace_back(std::make_unique<BAC>());
out.emplace_back(std::make_unique<BB>());
out.emplace_back(std::make_unique<BBA>());
out.emplace_back(std::make_unique<BBB>());
out.emplace_back(std::make_unique<BBC>());
out.emplace_back(std::make_unique<BC>());
out.emplace_back(std::make_unique<BCA>());
out.emplace_back(std::make_unique<BCB>());
out.emplace_back(std::make_unique<BCC>());
out.emplace_back(std::make_unique<C>());
out.emplace_back(std::make_unique<CA>());
out.emplace_back(std::make_unique<CAA>());
out.emplace_back(std::make_unique<CAB>());
out.emplace_back(std::make_unique<CAC>());
out.emplace_back(std::make_unique<CB>());
out.emplace_back(std::make_unique<CBA>());
out.emplace_back(std::make_unique<CBB>());
out.emplace_back(std::make_unique<CBC>());
out.emplace_back(std::make_unique<CC>());
out.emplace_back(std::make_unique<CCA>());
out.emplace_back(std::make_unique<CCB>());
out.emplace_back(std::make_unique<CCC>());
return out;
}
void CastableLargeSwitch(::benchmark::State& state) {
auto objects = MakeObjects();
size_t i = 0;
for (auto _ : state) {
auto* object = objects[i % objects.size()].get();
Switch(
object, //
[&](const AAA*) { ::benchmark::DoNotOptimize(i += 40); },
[&](const AAB*) { ::benchmark::DoNotOptimize(i += 50); },
[&](const AAC*) { ::benchmark::DoNotOptimize(i += 60); },
[&](const ABA*) { ::benchmark::DoNotOptimize(i += 80); },
[&](const ABB*) { ::benchmark::DoNotOptimize(i += 90); },
[&](const ABC*) { ::benchmark::DoNotOptimize(i += 100); },
[&](const ACA*) { ::benchmark::DoNotOptimize(i += 120); },
[&](const ACB*) { ::benchmark::DoNotOptimize(i += 130); },
[&](const ACC*) { ::benchmark::DoNotOptimize(i += 140); },
[&](const BAA*) { ::benchmark::DoNotOptimize(i += 170); },
[&](const BAB*) { ::benchmark::DoNotOptimize(i += 180); },
[&](const BAC*) { ::benchmark::DoNotOptimize(i += 190); },
[&](const BBA*) { ::benchmark::DoNotOptimize(i += 210); },
[&](const BBB*) { ::benchmark::DoNotOptimize(i += 220); },
[&](const BBC*) { ::benchmark::DoNotOptimize(i += 230); },
[&](const BCA*) { ::benchmark::DoNotOptimize(i += 250); },
[&](const BCB*) { ::benchmark::DoNotOptimize(i += 260); },
[&](const BCC*) { ::benchmark::DoNotOptimize(i += 270); },
[&](const CA*) { ::benchmark::DoNotOptimize(i += 290); },
[&](const CAA*) { ::benchmark::DoNotOptimize(i += 300); },
[&](const CAB*) { ::benchmark::DoNotOptimize(i += 310); },
[&](const CAC*) { ::benchmark::DoNotOptimize(i += 320); },
[&](const CBA*) { ::benchmark::DoNotOptimize(i += 340); },
[&](const CBB*) { ::benchmark::DoNotOptimize(i += 350); },
[&](const CBC*) { ::benchmark::DoNotOptimize(i += 360); },
[&](const CCA*) { ::benchmark::DoNotOptimize(i += 380); },
[&](const CCB*) { ::benchmark::DoNotOptimize(i += 390); },
[&](const CCC*) { ::benchmark::DoNotOptimize(i += 400); },
[&](Default) { ::benchmark::DoNotOptimize(i += 123); });
i = (i * 31) ^ (i << 5);
}
}
BENCHMARK(CastableLargeSwitch);
void CastableMediumSwitch(::benchmark::State& state) {
auto objects = MakeObjects();
size_t i = 0;
for (auto _ : state) {
auto* object = objects[i % objects.size()].get();
Switch(
object, //
[&](const ACB*) { ::benchmark::DoNotOptimize(i += 130); },
[&](const BAA*) { ::benchmark::DoNotOptimize(i += 170); },
[&](const BAB*) { ::benchmark::DoNotOptimize(i += 180); },
[&](const BBA*) { ::benchmark::DoNotOptimize(i += 210); },
[&](const BBB*) { ::benchmark::DoNotOptimize(i += 220); },
[&](const CAA*) { ::benchmark::DoNotOptimize(i += 300); },
[&](const CCA*) { ::benchmark::DoNotOptimize(i += 380); },
[&](const CCB*) { ::benchmark::DoNotOptimize(i += 390); },
[&](const CCC*) { ::benchmark::DoNotOptimize(i += 400); },
[&](Default) { ::benchmark::DoNotOptimize(i += 123); });
i = (i * 31) ^ (i << 5);
}
}
BENCHMARK(CastableMediumSwitch);
void CastableSmallSwitch(::benchmark::State& state) {
auto objects = MakeObjects();
size_t i = 0;
for (auto _ : state) {
auto* object = objects[i % objects.size()].get();
Switch(
object, //
[&](const AAB*) { ::benchmark::DoNotOptimize(i += 30); },
[&](const CAC*) { ::benchmark::DoNotOptimize(i += 290); },
[&](const CAA*) { ::benchmark::DoNotOptimize(i += 300); });
i = (i * 31) ^ (i << 5);
}
}
BENCHMARK(CastableSmallSwitch);
} // namespace
} // namespace tint
TINT_INSTANTIATE_TYPEINFO(tint::Base);
TINT_INSTANTIATE_TYPEINFO(tint::A);
TINT_INSTANTIATE_TYPEINFO(tint::AA);
TINT_INSTANTIATE_TYPEINFO(tint::AAA);
TINT_INSTANTIATE_TYPEINFO(tint::AAB);
TINT_INSTANTIATE_TYPEINFO(tint::AAC);
TINT_INSTANTIATE_TYPEINFO(tint::AB);
TINT_INSTANTIATE_TYPEINFO(tint::ABA);
TINT_INSTANTIATE_TYPEINFO(tint::ABB);
TINT_INSTANTIATE_TYPEINFO(tint::ABC);
TINT_INSTANTIATE_TYPEINFO(tint::AC);
TINT_INSTANTIATE_TYPEINFO(tint::ACA);
TINT_INSTANTIATE_TYPEINFO(tint::ACB);
TINT_INSTANTIATE_TYPEINFO(tint::ACC);
TINT_INSTANTIATE_TYPEINFO(tint::B);
TINT_INSTANTIATE_TYPEINFO(tint::BA);
TINT_INSTANTIATE_TYPEINFO(tint::BAA);
TINT_INSTANTIATE_TYPEINFO(tint::BAB);
TINT_INSTANTIATE_TYPEINFO(tint::BAC);
TINT_INSTANTIATE_TYPEINFO(tint::BB);
TINT_INSTANTIATE_TYPEINFO(tint::BBA);
TINT_INSTANTIATE_TYPEINFO(tint::BBB);
TINT_INSTANTIATE_TYPEINFO(tint::BBC);
TINT_INSTANTIATE_TYPEINFO(tint::BC);
TINT_INSTANTIATE_TYPEINFO(tint::BCA);
TINT_INSTANTIATE_TYPEINFO(tint::BCB);
TINT_INSTANTIATE_TYPEINFO(tint::BCC);
TINT_INSTANTIATE_TYPEINFO(tint::C);
TINT_INSTANTIATE_TYPEINFO(tint::CA);
TINT_INSTANTIATE_TYPEINFO(tint::CAA);
TINT_INSTANTIATE_TYPEINFO(tint::CAB);
TINT_INSTANTIATE_TYPEINFO(tint::CAC);
TINT_INSTANTIATE_TYPEINFO(tint::CB);
TINT_INSTANTIATE_TYPEINFO(tint::CBA);
TINT_INSTANTIATE_TYPEINFO(tint::CBB);
TINT_INSTANTIATE_TYPEINFO(tint::CBC);
TINT_INSTANTIATE_TYPEINFO(tint::CC);
TINT_INSTANTIATE_TYPEINFO(tint::CCA);
TINT_INSTANTIATE_TYPEINFO(tint::CCB);
TINT_INSTANTIATE_TYPEINFO(tint::CCC);
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