- abacaab4b11a69dd4db627bd183571d7cabb8def Refinement to previous time.h edit (in this same github p... by Greg Falcon <gfalcon@google.com>

  - 64db19b773134c6c8004e3b23c9ca892efbf8bae Move SpinLock's adaptive spin count computation from a st... by Derek Mauro <dmauro@google.com>
  - 6f9533fb44a52485a7c2bbb9b4efc7bf8d6c359a Import of CCTZ from GitHub. by Abseil Team <absl-team@google.com>
  - a211d7255c986e8dd4ceada362c0d054a6a1969a Cleanup exception flags by Abseil Team <absl-team@google.com>
  - babdb29c590126fe9bba5229fe91034b5b5c358a Release time benchmarks. by Alex Strelnikov <strel@google.com>
  - 5803b32a3ff123d1fb57a0c471d199c818357c9f Release memutil microbenchmarks. by Alex Strelnikov <strel@google.com>
  - 5357d4890d30e80c53beb05af32500fb20e9402b Add parens around expansion of ABSL_PREDICT_{FALSE,TRUE} ... by Abseil Team <absl-team@google.com>
  - 32023f61a239a5f6b1c59e577bfe81b179bbcd2d Reformat build rule tag. by Alex Strelnikov <strel@google.com>
  - 833758ecf2b0cf7a42bbd50b5b127e416425c168 Release uint128 microbenchmarks. by Alex Strelnikov <strel@google.com>
  - c115a9bca1f944b90fdc78a56b2de176466b124f Disambiguate bitwise-not of size_type by Abseil Team <absl-team@google.com>
  - f6905f5b5f6e425792de646edafde440548d9346 Updates ConstructorTracker and TrackedObjects with 1) a m... by Abseil Team <absl-team@google.com>
  - 147c553bdd5d2db20a38f75c4d1ef973d6c709c5 Changes the absl::Duration factory functions to disallow ... by Greg Miller <jgm@google.com>
  - dba2b96d11b5264546b283ba452f2de1303b0f07 White space fix by Alex Strelnikov <strel@google.com>

GitOrigin-RevId: abacaab4b11a69dd4db627bd183571d7cabb8def
Change-Id: I6fa34f20d0b2f898e7b5475a603111413bb80a67

1 files changed, 72 insertions, 0 deletions

diff --git a/absl/time/clock_benchmark.cc b/absl/time/clock_benchmark.cc
new file mode 100644
index 000000000000..3d3cd9d5c42c
--- /dev/null
+++ b/absl/time/clock_benchmark.cc
@@ -0,0 +1,72 @@
+// 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
+//
+//      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 "absl/time/clock.h"
+
+#if !defined(_WIN32)
+#include <sys/time.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