Add 'third_party/abseil_cpp/' from commit '768eb2ca2857342673fcd462792ce04b8bac3fa3' r/781

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54beb5796cd408fbe15d2d2da09ff37adf
git-subtree-split: 768eb2ca2857342673fcd462792ce04b8bac3fa3

1 files changed, 74 insertions, 0 deletions

diff --git a/third_party/abseil_cpp/absl/time/clock_benchmark.cc b/third_party/abseil_cpp/absl/time/clock_benchmark.cc
new file mode 100644
index 000000000000..c5c795ecbd23
--- /dev/null
+++ b/third_party/abseil_cpp/absl/time/clock_benchmark.cc
@@ -0,0 +1,74 @@
+// Copyright 2018 The Abseil 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
+//
+//      https://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 "absl/time/clock.h"
+
+#if !defined(_WIN32)
+#include <sys/time.h>
+#else
+#include <winsock2.h>
+#endif  // _WIN32
+#include <cstdio>
+
+#include "absl/base/internal/cycleclock.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+void BM_Clock_Now_AbslTime(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(absl::Now());
+  }
+}
+BENCHMARK(BM_Clock_Now_AbslTime);
+
+void BM_Clock_Now_GetCurrentTimeNanos(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(absl::GetCurrentTimeNanos());
+  }
+}
+BENCHMARK(BM_Clock_Now_GetCurrentTimeNanos);
+
+void BM_Clock_Now_AbslTime_ToUnixNanos(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(absl::ToUnixNanos(absl::Now()));
+  }
+}
+BENCHMARK(BM_Clock_Now_AbslTime_ToUnixNanos);
+
+void BM_Clock_Now_CycleClock(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(absl::base_internal::CycleClock::Now());
+  }
+}
+BENCHMARK(BM_Clock_Now_CycleClock);
+
+#if !defined(_WIN32)
+static void BM_Clock_Now_gettimeofday(benchmark::State& state) {
+  struct timeval tv;
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(gettimeofday(&tv, nullptr));
+  }
+}
+BENCHMARK(BM_Clock_Now_gettimeofday);
+
+static void BM_Clock_Now_clock_gettime(benchmark::State& state) {
+  struct timespec ts;
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(clock_gettime(CLOCK_REALTIME, &ts));
+  }
+}
+BENCHMARK(BM_Clock_Now_clock_gettime);
+#endif  // _WIN32
+
+}  // namespace