text: /*
   *
   * Copyright 2017 gRPC 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.
   *
   */
  
  /* Test out various metadata handling primitives */
  
  #include <benchmark/benchmark.h>
  #include <grpc/grpc.h>
  
  #include "src/core/lib/slice/slice_internal.h"
  #include "src/core/lib/transport/metadata.h"
  #include "src/core/lib/transport/static_metadata.h"
  
  #include "test/cpp/microbenchmarks/helpers.h"
  #include "test/cpp/util/test_config.h"
  
  static void BM_SliceFromStatic(benchmark::State& state) {
    TrackCounters track_counters;
    while (state.KeepRunning()) {
      benchmark::DoNotOptimize(grpc_core::ExternallyManagedSlice("abc"));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceFromStatic);
  
  static void BM_SliceFromCopied(benchmark::State& state) {
    TrackCounters track_counters;
    while (state.KeepRunning()) {
      grpc_slice_unref(grpc_core::UnmanagedMemorySlice("abc"));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceFromCopied);
  
  static void BM_SliceIntern(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExternallyManagedSlice slice("abc");
    while (state.KeepRunning()) {
      grpc_slice_unref(grpc_core::ManagedMemorySlice(&slice));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceIntern);
  
  static void BM_SliceReIntern(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExternallyManagedSlice static_slice("abc");
    grpc_core::ManagedMemorySlice slice(&static_slice);
    while (state.KeepRunning()) {
      grpc_slice_unref(grpc_core::ManagedMemorySlice(&slice));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceReIntern);
  
  static void BM_SliceInternStaticMetadata(benchmark::State& state) {
    TrackCounters track_counters;
    while (state.KeepRunning()) {
      benchmark::DoNotOptimize(grpc_core::ManagedMemorySlice(&GRPC_MDSTR_GZIP));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceInternStaticMetadata);
  
  static void BM_SliceInternEqualToStaticMetadata(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExternallyManagedSlice slice("gzip");
    while (state.KeepRunning()) {
      benchmark::DoNotOptimize(grpc_core::ManagedMemorySlice(&slice));
    }
    track_counters.Finish(state);
  }
  BENCHMARK(BM_SliceInternEqualToStaticMetadata);
  
  static void BM_MetadataFromNonInternedSlices(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExternallyManagedSlice k("key");
    grpc_core::ExternallyManagedSlice v("value");
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
    }
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromNonInternedSlices);
  
  static void BM_MetadataFromInternedSlices(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ManagedMemorySlice v("value");
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
    }
  
    grpc_slice_unref(k);
    grpc_slice_unref(v);
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromInternedSlices);
  
  static void BM_MetadataFromInternedSlicesAlreadyInIndex(
      benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ManagedMemorySlice v("value");
    grpc_core::ExecCtx exec_ctx;
    grpc_mdelem seed = grpc_mdelem_create(k, v, nullptr);
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
    }
    GRPC_MDELEM_UNREF(seed);
  
    grpc_slice_unref(k);
    grpc_slice_unref(v);
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromInternedSlicesAlreadyInIndex);
  
  static void BM_MetadataFromInternedKey(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ExternallyManagedSlice v("value");
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
    }
  
    grpc_slice_unref(k);
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromInternedKey);
  
  static void BM_MetadataFromNonInternedSlicesWithBackingStore(
      benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExternallyManagedSlice k("key");
    grpc_core::ExternallyManagedSlice v("value");
    char backing_store[sizeof(grpc_mdelem_data)];
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(
          k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
    }
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromNonInternedSlicesWithBackingStore);
  
  static void BM_MetadataFromInternedSlicesWithBackingStore(
      benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ManagedMemorySlice v("value");
    char backing_store[sizeof(grpc_mdelem_data)];
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(
          k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
    }
  
    grpc_slice_unref(k);
    grpc_slice_unref(v);
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromInternedSlicesWithBackingStore);
  
  static void BM_MetadataFromInternedKeyWithBackingStore(
      benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ExternallyManagedSlice v("value");
    char backing_store[sizeof(grpc_mdelem_data)];
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(grpc_mdelem_create(
          k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
    }
  
    grpc_slice_unref(k);
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromInternedKeyWithBackingStore);
  
  static void BM_MetadataFromStaticMetadataStrings(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(
          grpc_mdelem_create(GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr));
    }
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromStaticMetadataStrings);
  
  static void BM_MetadataFromStaticMetadataStringsNotIndexed(
      benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExecCtx exec_ctx;
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(
          grpc_mdelem_create(GRPC_MDSTR_STATUS, GRPC_MDSTR_GZIP, nullptr));
    }
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataFromStaticMetadataStringsNotIndexed);
  
  static void BM_MetadataRefUnrefExternal(benchmark::State& state) {
    TrackCounters track_counters;
    char backing_store[sizeof(grpc_mdelem_data)];
    grpc_core::ExecCtx exec_ctx;
    grpc_mdelem el =
        grpc_mdelem_create(grpc_core::ExternallyManagedSlice("a"),
                           grpc_core::ExternallyManagedSlice("b"),
                           reinterpret_cast<grpc_mdelem_data*>(backing_store));
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
    }
    GRPC_MDELEM_UNREF(el);
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataRefUnrefExternal);
  
  static void BM_MetadataRefUnrefInterned(benchmark::State& state) {
    TrackCounters track_counters;
    char backing_store[sizeof(grpc_mdelem_data)];
    grpc_core::ExecCtx exec_ctx;
    grpc_core::ManagedMemorySlice k("key");
    grpc_core::ManagedMemorySlice v("value");
    grpc_mdelem el = grpc_mdelem_create(
        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store));
    grpc_slice_unref(k);
    grpc_slice_unref(v);
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
    }
    GRPC_MDELEM_UNREF(el);
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataRefUnrefInterned);
  
  static void BM_MetadataRefUnrefAllocated(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExecCtx exec_ctx;
    grpc_mdelem el =
        grpc_mdelem_create(grpc_core::ExternallyManagedSlice("a"),
                           grpc_core::ExternallyManagedSlice("b"), nullptr);
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
    }
    GRPC_MDELEM_UNREF(el);
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataRefUnrefAllocated);
  
  static void BM_MetadataRefUnrefStatic(benchmark::State& state) {
    TrackCounters track_counters;
    grpc_core::ExecCtx exec_ctx;
    grpc_mdelem el =
        grpc_mdelem_create(GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr);
    while (state.KeepRunning()) {
      GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
    }
    GRPC_MDELEM_UNREF(el);
  
    track_counters.Finish(state);
  }
  BENCHMARK(BM_MetadataRefUnrefStatic);
  
  // Some distros have RunSpecifiedBenchmarks under the benchmark namespace,
  // and others do not. This allows us to support both modes.
  namespace benchmark {
  void RunTheBenchmarksNamespaced() { RunSpecifiedBenchmarks(); }
  }  // namespace benchmark
  
  int main(int argc, char** argv) {
    LibraryInitializer libInit;
    ::benchmark::Initialize(&argc, argv);
    ::grpc::testing::InitTest(&argc, &argv, false);
    benchmark::RunTheBenchmarksNamespaced();
    return 0;
  }
  