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-rw-r--r--absl/time/BUILD.bazel20
-rw-r--r--absl/time/clock_benchmark.cc72
-rw-r--r--absl/time/duration_benchmark.cc361
-rw-r--r--absl/time/duration_test.cc20
-rw-r--r--absl/time/format_benchmark.cc63
-rw-r--r--absl/time/internal/cctz/src/time_zone_format_test.cc13
-rw-r--r--absl/time/internal/cctz/src/time_zone_lookup_test.cc17
-rw-r--r--absl/time/time.h88
-rw-r--r--absl/time/time_benchmark.cc316
9 files changed, 899 insertions, 71 deletions
diff --git a/absl/time/BUILD.bazel b/absl/time/BUILD.bazel
index 64cb99f7..fe55fe1f 100644
--- a/absl/time/BUILD.bazel
+++ b/absl/time/BUILD.bazel
@@ -93,3 +93,23 @@ cc_test(
"@com_google_googletest//:gtest_main",
],
)
+
+cc_test(
+ name = "time_benchmark",
+ srcs = [
+ "clock_benchmark.cc",
+ "duration_benchmark.cc",
+ "format_benchmark.cc",
+ "time_benchmark.cc",
+ ],
+ copts = ABSL_TEST_COPTS,
+ tags = [
+ "benchmark",
+ ],
+ deps = [
+ ":test_util",
+ ":time",
+ "//absl/base",
+ "@com_github_google_benchmark//:benchmark_main",
+ ],
+)
diff --git a/absl/time/clock_benchmark.cc b/absl/time/clock_benchmark.cc
new file mode 100644
index 00000000..3d3cd9d5
--- /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
diff --git a/absl/time/duration_benchmark.cc b/absl/time/duration_benchmark.cc
new file mode 100644
index 00000000..54f89a1f
--- /dev/null
+++ b/absl/time/duration_benchmark.cc
@@ -0,0 +1,361 @@
+// 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 <cmath>
+#include <cstddef>
+#include <cstdint>
+#include <ctime>
+#include <string>
+
+#include "absl/time/time.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+//
+// Factory functions
+//
+
+void BM_Duration_Factory_Nanoseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Nanoseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Nanoseconds);
+
+void BM_Duration_Factory_Microseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Microseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Microseconds);
+
+void BM_Duration_Factory_Milliseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Milliseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Milliseconds);
+
+void BM_Duration_Factory_Seconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Seconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Seconds);
+
+void BM_Duration_Factory_Minutes(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Minutes(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Minutes);
+
+void BM_Duration_Factory_Hours(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Hours(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Hours);
+
+//
+// Arithmetic
+//
+
+void BM_Duration_Addition(benchmark::State& state) {
+ absl::Duration d = absl::Nanoseconds(1);
+ absl::Duration step = absl::Milliseconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d += step);
+ }
+}
+BENCHMARK(BM_Duration_Addition);
+
+void BM_Duration_Subtraction(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(std::numeric_limits<int64_t>::max());
+ absl::Duration step = absl::Milliseconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d -= step);
+ }
+}
+BENCHMARK(BM_Duration_Subtraction);
+
+void BM_Duration_Multiplication_Fixed(benchmark::State& state) {
+ absl::Duration d = absl::Milliseconds(1);
+ absl::Duration s;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(s += d * (i + 1));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Multiplication_Fixed);
+
+void BM_Duration_Multiplication_Double(benchmark::State& state) {
+ absl::Duration d = absl::Milliseconds(1);
+ absl::Duration s;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(s += d * (i + 1.0));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Multiplication_Double);
+
+void BM_Duration_Division_Fixed(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d /= i + 1);
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Division_Fixed);
+
+void BM_Duration_Division_Double(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d /= i + 1.0);
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Division_Double);
+
+void BM_Duration_FDivDuration_Nanoseconds(benchmark::State& state) {
+ double d = 1;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ d += absl::FDivDuration(absl::Milliseconds(i), absl::Nanoseconds(1)));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_FDivDuration_Nanoseconds);
+
+void BM_Duration_IDivDuration_Nanoseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a +=
+ absl::IDivDuration(absl::Nanoseconds(i),
+ absl::Nanoseconds(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Nanoseconds);
+
+void BM_Duration_IDivDuration_Microseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Microseconds(i),
+ absl::Microseconds(1),
+ &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Microseconds);
+
+void BM_Duration_IDivDuration_Milliseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Milliseconds(i),
+ absl::Milliseconds(1),
+ &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Milliseconds);
+
+void BM_Duration_IDivDuration_Seconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Seconds(i), absl::Seconds(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Seconds);
+
+void BM_Duration_IDivDuration_Minutes(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Minutes(i), absl::Minutes(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Minutes);
+
+void BM_Duration_IDivDuration_Hours(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Hours(i), absl::Hours(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Hours);
+
+void BM_Duration_ToInt64Nanoseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Nanoseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Nanoseconds);
+
+void BM_Duration_ToInt64Microseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Microseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Microseconds);
+
+void BM_Duration_ToInt64Milliseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Milliseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Milliseconds);
+
+void BM_Duration_ToInt64Seconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Seconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Seconds);
+
+void BM_Duration_ToInt64Minutes(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Minutes(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Minutes);
+
+void BM_Duration_ToInt64Hours(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Hours(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Hours);
+
+//
+// To/FromTimespec
+//
+
+void BM_Duration_ToTimespec_AbslTime(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToTimespec(d));
+ }
+}
+BENCHMARK(BM_Duration_ToTimespec_AbslTime);
+
+ABSL_ATTRIBUTE_NOINLINE timespec DoubleToTimespec(double seconds) {
+ timespec ts;
+ ts.tv_sec = seconds;
+ ts.tv_nsec = (seconds - ts.tv_sec) * (1000 * 1000 * 1000);
+ return ts;
+}
+
+void BM_Duration_ToTimespec_Double(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(DoubleToTimespec(1.0));
+ }
+}
+BENCHMARK(BM_Duration_ToTimespec_Double);
+
+void BM_Duration_FromTimespec_AbslTime(benchmark::State& state) {
+ timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ while (state.KeepRunning()) {
+ if (++ts.tv_nsec == 1000 * 1000 * 1000) {
+ ++ts.tv_sec;
+ ts.tv_nsec = 0;
+ }
+ benchmark::DoNotOptimize(absl::DurationFromTimespec(ts));
+ }
+}
+BENCHMARK(BM_Duration_FromTimespec_AbslTime);
+
+ABSL_ATTRIBUTE_NOINLINE double TimespecToDouble(timespec ts) {
+ return ts.tv_sec + (ts.tv_nsec / (1000 * 1000 * 1000));
+}
+
+void BM_Duration_FromTimespec_Double(benchmark::State& state) {
+ timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ while (state.KeepRunning()) {
+ if (++ts.tv_nsec == 1000 * 1000 * 1000) {
+ ++ts.tv_sec;
+ ts.tv_nsec = 0;
+ }
+ benchmark::DoNotOptimize(TimespecToDouble(ts));
+ }
+}
+BENCHMARK(BM_Duration_FromTimespec_Double);
+
+//
+// String conversions
+//
+
+const char* const kDurations[] = {
+ "0", // 0
+ "123ns", // 1
+ "1h2m3s", // 2
+ "-2h3m4.005006007s", // 3
+ "2562047788015215h30m7.99999999975s", // 4
+};
+const int kNumDurations = sizeof(kDurations) / sizeof(kDurations[0]);
+
+void BM_Duration_FormatDuration(benchmark::State& state) {
+ const std::string s = kDurations[state.range(0)];
+ state.SetLabel(s);
+ absl::Duration d;
+ absl::ParseDuration(kDurations[state.range(0)], &d);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::FormatDuration(d));
+ }
+}
+BENCHMARK(BM_Duration_FormatDuration)->DenseRange(0, kNumDurations - 1);
+
+void BM_Duration_ParseDuration(benchmark::State& state) {
+ const std::string s = kDurations[state.range(0)];
+ state.SetLabel(s);
+ absl::Duration d;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ParseDuration(s, &d));
+ }
+}
+BENCHMARK(BM_Duration_ParseDuration)->DenseRange(0, kNumDurations - 1);
+
+} // namespace
diff --git a/absl/time/duration_test.cc b/absl/time/duration_test.cc
index 7918e167..704684ed 100644
--- a/absl/time/duration_test.cc
+++ b/absl/time/duration_test.cc
@@ -330,18 +330,10 @@ TEST(Duration, ToChrono) {
EXPECT_EQ(hours::max(), absl::ToChronoHours(inf));
}
-// Used for testing the factory overloads.
-template <typename T>
-struct ImplicitlyConvertible {
- T n_;
- explicit ImplicitlyConvertible(T n) : n_(n) {}
- // Marking this conversion operator with 'explicit' will cause the test to
- // fail (as desired).
- operator T() { return n_; }
-};
-
TEST(Duration, FactoryOverloads) {
+ enum E { kOne = 1 };
#define TEST_FACTORY_OVERLOADS(NAME) \
+ EXPECT_EQ(1, NAME(kOne) / NAME(kOne)); \
EXPECT_EQ(1, NAME(static_cast<int8_t>(1)) / NAME(1)); \
EXPECT_EQ(1, NAME(static_cast<int16_t>(1)) / NAME(1)); \
EXPECT_EQ(1, NAME(static_cast<int32_t>(1)) / NAME(1)); \
@@ -350,14 +342,6 @@ TEST(Duration, FactoryOverloads) {
EXPECT_EQ(1, NAME(static_cast<uint16_t>(1)) / NAME(1)); \
EXPECT_EQ(1, NAME(static_cast<uint32_t>(1)) / NAME(1)); \
EXPECT_EQ(1, NAME(static_cast<uint64_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<int8_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<int16_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<int32_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<int64_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<uint8_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<uint16_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<uint32_t>(1)) / NAME(1)); \
- EXPECT_EQ(1, NAME(ImplicitlyConvertible<uint64_t>(1)) / NAME(1)); \
EXPECT_EQ(NAME(1) / 2, NAME(static_cast<float>(0.5))); \
EXPECT_EQ(NAME(1) / 2, NAME(static_cast<double>(0.5))); \
EXPECT_EQ(1.5, absl::FDivDuration(NAME(static_cast<float>(1.5)), NAME(1))); \
diff --git a/absl/time/format_benchmark.cc b/absl/time/format_benchmark.cc
new file mode 100644
index 00000000..ee53d71c
--- /dev/null
+++ b/absl/time/format_benchmark.cc
@@ -0,0 +1,63 @@
+// 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 <cstddef>
+#include <string>
+
+#include "absl/time/internal/test_util.h"
+#include "absl/time/time.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+namespace {
+const char* const kFormats[] = {
+ absl::RFC1123_full, // 0
+ absl::RFC1123_no_wday, // 1
+ absl::RFC3339_full, // 2
+ absl::RFC3339_sec, // 3
+ "%Y-%m-%dT%H:%M:%S", // 4
+ "%Y-%m-%d", // 5
+};
+const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]);
+} // namespace
+
+void BM_Format_FormatTime(benchmark::State& state) {
+ const std::string fmt = kFormats[state.range(0)];
+ state.SetLabel(fmt);
+ const absl::TimeZone lax =
+ absl::time_internal::LoadTimeZone("America/Los_Angeles");
+ const absl::Time t =
+ absl::FromDateTime(1977, 6, 28, 9, 8, 7, lax) + absl::Nanoseconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::FormatTime(fmt, t, lax).length());
+ }
+}
+BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1);
+
+void BM_Format_ParseTime(benchmark::State& state) {
+ const std::string fmt = kFormats[state.range(0)];
+ state.SetLabel(fmt);
+ const absl::TimeZone lax =
+ absl::time_internal::LoadTimeZone("America/Los_Angeles");
+ absl::Time t =
+ absl::FromDateTime(1977, 6, 28, 9, 8, 7, lax) + absl::Nanoseconds(1);
+ const std::string when = absl::FormatTime(fmt, t, lax);
+ std::string err;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ParseTime(fmt, when, lax, &t, &err));
+ }
+}
+BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1);
+
+} // namespace
diff --git a/absl/time/internal/cctz/src/time_zone_format_test.cc b/absl/time/internal/cctz/src/time_zone_format_test.cc
index 3a5f19ac..7d5b02ad 100644
--- a/absl/time/internal/cctz/src/time_zone_format_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_format_test.cc
@@ -463,13 +463,12 @@ TEST(Format, ExtendedSecondOffset) {
EXPECT_TRUE(load_time_zone("Europe/Moscow", &tz));
tp = convert(civil_second(1919, 6, 30, 23, 59, 59), utc);
- if (tz.lookup(tp).offset == 4 * 60 * 60) {
- // We're likely dealing with zoneinfo that doesn't support really old
- // timestamps, so Europe/Moscow never looks to be on local mean time.
- } else {
- TestFormatSpecifier(tp, tz, "%E*z", "+04:31:19");
- TestFormatSpecifier(tp, tz, "%Ez", "+04:31");
- }
+#if defined(__ANDROID__) && __ANDROID_API__ < 25
+ // Only Android 'N'.1 and beyond have this tz2016g transition.
+#else
+ TestFormatSpecifier(tp, tz, "%E*z", "+04:31:19");
+ TestFormatSpecifier(tp, tz, "%Ez", "+04:31");
+#endif
tp += seconds(1);
TestFormatSpecifier(tp, tz, "%E*z", "+04:00:00");
}
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index f97eab02..06b172a8 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -693,7 +693,14 @@ TEST(TimeZones, LoadZonesConcurrently) {
// Allow a small number of failures to account for skew between
// the contents of kTimeZoneNames and the zoneinfo data source.
+#if defined(__ANDROID__)
+ // Cater to the possibility of using an even older zoneinfo data
+ // source when running on Android, where it is difficult to override
+ // the bionic tzdata provided by the test environment.
+ const std::size_t max_failures = 20;
+#else
const std::size_t max_failures = 3;
+#endif
std::set<std::string> failures;
for (const auto& thread_failure : thread_failures) {
failures.insert(thread_failure.begin(), thread_failure.end());
@@ -839,7 +846,7 @@ TEST(TimeZoneImpl, LocalTimeInFixed) {
const time_zone tz = fixed_time_zone(offset);
const auto tp = system_clock::from_time_t(0);
ExpectTime(tp, tz, 1969, 12, 31, 15, 26, 13, offset.count(), false,
- "UTC-083347");
+ "-083347");
EXPECT_EQ(weekday::wednesday, get_weekday(civil_day(convert(tp, tz))));
}
@@ -1098,6 +1105,9 @@ TEST(TimeZoneEdgeCase, PacificApia) {
TEST(TimeZoneEdgeCase, AfricaCairo) {
const time_zone tz = LoadZone("Africa/Cairo");
+#if defined(__ANDROID__) && __ANDROID_API__ < 21
+ // Only Android 'L' and beyond have this tz2014c transition.
+#else
// An interesting case of midnight not existing.
//
// 1400191199 == Thu, 15 May 2014 23:59:59 +0200 (EET)
@@ -1106,11 +1116,15 @@ TEST(TimeZoneEdgeCase, AfricaCairo) {
ExpectTime(tp, tz, 2014, 5, 15, 23, 59, 59, 2 * 3600, false, "EET");
tp += seconds(1);
ExpectTime(tp, tz, 2014, 5, 16, 1, 0, 0, 3 * 3600, true, "EEST");
+#endif
}
TEST(TimeZoneEdgeCase, AfricaMonrovia) {
const time_zone tz = LoadZone("Africa/Monrovia");
+#if defined(__ANDROID__) && __ANDROID_API__ < 26
+ // Only Android 'O' and beyond have this tz2017b transition.
+#else
// Strange offset change -00:44:30 -> +00:00:00 (non-DST)
//
// 63593069 == Thu, 6 Jan 1972 23:59:59 -0044 (MMT)
@@ -1119,6 +1133,7 @@ TEST(TimeZoneEdgeCase, AfricaMonrovia) {
ExpectTime(tp, tz, 1972, 1, 6, 23, 59, 59, -44.5 * 60, false, "MMT");
tp += seconds(1);
ExpectTime(tp, tz, 1972, 1, 7, 0, 44, 30, 0 * 60, false, "GMT");
+#endif
}
TEST(TimeZoneEdgeCase, AmericaJamaica) {
diff --git a/absl/time/time.h b/absl/time/time.h
index c50d69a5..99c12bbd 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -82,8 +82,15 @@ constexpr Duration MakeDuration(int64_t hi, uint32_t lo);
constexpr Duration MakeDuration(int64_t hi, int64_t lo);
constexpr int64_t kTicksPerNanosecond = 4;
constexpr int64_t kTicksPerSecond = 1000 * 1000 * 1000 * kTicksPerNanosecond;
+template <std::intmax_t N>
+constexpr Duration FromInt64(int64_t v, std::ratio<1, N>);
+constexpr Duration FromInt64(int64_t v, std::ratio<60>);
+constexpr Duration FromInt64(int64_t v, std::ratio<3600>);
+template <typename T>
+using EnableIfIntegral = typename std::enable_if<
+ std::is_integral<T>::value || std::is_enum<T>::value, int>::type;
template <typename T>
-using IsFloatingPoint =
+using EnableIfFloat =
typename std::enable_if<std::is_floating_point<T>::value, int>::type;
} // namespace time_internal
@@ -178,15 +185,15 @@ inline Duration operator-(Duration lhs, Duration rhs) { return lhs -= rhs; }
// Multiplicative Operators
template <typename T>
-inline Duration operator*(Duration lhs, T rhs) {
+Duration operator*(Duration lhs, T rhs) {
return lhs *= rhs;
}
template <typename T>
-inline Duration operator*(T lhs, Duration rhs) {
+Duration operator*(T lhs, Duration rhs) {
return rhs *= lhs;
}
template <typename T>
-inline Duration operator/(Duration lhs, T rhs) {
+Duration operator/(Duration lhs, T rhs) {
return lhs /= rhs;
}
inline int64_t operator/(Duration lhs, Duration rhs) {
@@ -322,27 +329,27 @@ constexpr Duration Hours(int64_t n);
// Example:
// auto a = absl::Seconds(1.5); // OK
// auto b = absl::Milliseconds(1500); // BETTER
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Nanoseconds(T n) {
return n * Nanoseconds(1);
}
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Microseconds(T n) {
return n * Microseconds(1);
}
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Milliseconds(T n) {
return n * Milliseconds(1);
}
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Seconds(T n) {
return n * Seconds(1);
}
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Minutes(T n) {
return n * Minutes(1);
}
-template <typename T, time_internal::IsFloatingPoint<T> = 0>
+template <typename T, time_internal::EnableIfFloat<T> = 0>
Duration Hours(T n) {
return n * Hours(1);
}
@@ -1154,10 +1161,16 @@ constexpr Duration FromInt64(int64_t v, std::ratio<1, N>) {
v / N, v % N * kTicksPerNanosecond * 1000 * 1000 * 1000 / N);
}
constexpr Duration FromInt64(int64_t v, std::ratio<60>) {
- return Minutes(v);
+ return (v <= std::numeric_limits<int64_t>::max() / 60 &&
+ v >= std::numeric_limits<int64_t>::min() / 60)
+ ? MakeDuration(v * 60)
+ : v > 0 ? InfiniteDuration() : -InfiniteDuration();
}
constexpr Duration FromInt64(int64_t v, std::ratio<3600>) {
- return Hours(v);
+ return (v <= std::numeric_limits<int64_t>::max() / 3600 &&
+ v >= std::numeric_limits<int64_t>::min() / 3600)
+ ? MakeDuration(v * 3600)
+ : v > 0 ? InfiniteDuration() : -InfiniteDuration();
}
// IsValidRep64<T>(0) is true if the expression `int64_t{std::declval<T>()}` is
@@ -1220,6 +1233,24 @@ T ToChronoDuration(Duration d) {
}
} // namespace time_internal
+constexpr Duration Nanoseconds(int64_t n) {
+ return time_internal::FromInt64(n, std::nano{});
+}
+constexpr Duration Microseconds(int64_t n) {
+ return time_internal::FromInt64(n, std::micro{});
+}
+constexpr Duration Milliseconds(int64_t n) {
+ return time_internal::FromInt64(n, std::milli{});
+}
+constexpr Duration Seconds(int64_t n) {
+ return time_internal::FromInt64(n, std::ratio<1>{});
+}
+constexpr Duration Minutes(int64_t n) {
+ return time_internal::FromInt64(n, std::ratio<60>{});
+}
+constexpr Duration Hours(int64_t n) {
+ return time_internal::FromInt64(n, std::ratio<3600>{});
+}
constexpr bool operator<(Duration lhs, Duration rhs) {
return time_internal::GetRepHi(lhs) != time_internal::GetRepHi(rhs)
@@ -1261,39 +1292,6 @@ constexpr Duration operator-(Duration d) {
time_internal::GetRepLo(d));
}
-constexpr Duration Nanoseconds(int64_t n) {
- return time_internal::MakeNormalizedDuration(
- n / (1000 * 1000 * 1000),
- n % (1000 * 1000 * 1000) * time_internal::kTicksPerNanosecond);
-}
-
-constexpr Duration Microseconds(int64_t n) {
- return time_internal::MakeNormalizedDuration(
- n / (1000 * 1000),
- n % (1000 * 1000) * (1000 * time_internal::kTicksPerNanosecond));
-}
-
-constexpr Duration Milliseconds(int64_t n) {
- return time_internal::MakeNormalizedDuration(
- n / 1000, n % 1000 * (1000 * 1000 * time_internal::kTicksPerNanosecond));
-}
-
-constexpr Duration Seconds(int64_t n) { return time_internal::MakeDuration(n); }
-
-constexpr Duration Minutes(int64_t n) {
- return (n <= std::numeric_limits<int64_t>::max() / 60 &&
- n >= std::numeric_limits<int64_t>::min() / 60)
- ? time_internal::MakeDuration(n * 60)
- : n > 0 ? InfiniteDuration() : -InfiniteDuration();
-}
-
-constexpr Duration Hours(int64_t n) {
- return (n <= std::numeric_limits<int64_t>::max() / 3600 &&
- n >= std::numeric_limits<int64_t>::min() / 3600)
- ? time_internal::MakeDuration(n * 3600)
- : n > 0 ? InfiniteDuration() : -InfiniteDuration();
-}
-
constexpr Duration InfiniteDuration() {
return time_internal::MakeDuration(std::numeric_limits<int64_t>::max(), ~0U);
}
diff --git a/absl/time/time_benchmark.cc b/absl/time/time_benchmark.cc
new file mode 100644
index 00000000..e1009946
--- /dev/null
+++ b/absl/time/time_benchmark.cc
@@ -0,0 +1,316 @@
+// 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/time.h"
+
+#if !defined(_WIN32)
+#include <sys/time.h>
+#endif // _WIN32
+#include <algorithm>
+#include <cmath>
+#include <cstddef>
+#include <cstring>
+#include <ctime>
+#include <memory>
+#include <string>
+
+#include "absl/time/clock.h"
+#include "absl/time/internal/test_util.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+//
+// Addition/Subtraction of a duration
+//
+
+void BM_Time_Arithmetic(benchmark::State& state) {
+ const absl::Duration nano = absl::Nanoseconds(1);
+ const absl::Duration sec = absl::Seconds(1);
+ absl::Time t = absl::UnixEpoch();
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(t += nano);
+ benchmark::DoNotOptimize(t -= sec);
+ }
+}
+BENCHMARK(BM_Time_Arithmetic);
+
+//
+// Time difference
+//
+
+void BM_Time_Difference(benchmark::State& state) {
+ absl::Time start = absl::Now();
+ absl::Time end = start + absl::Nanoseconds(1);
+ absl::Duration diff;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(diff += end - start);
+ }
+}
+BENCHMARK(BM_Time_Difference);
+
+//
+// ToDateTime
+//
+// In each "ToDateTime" benchmark we switch between two instants
+// separated by at least one transition in order to defeat any
+// internal caching of previous results (e.g., see local_time_hint_).
+//
+// The "UTC" variants use UTC instead of the Google/local time zone.
+//
+
+void BM_Time_ToDateTime_Absl(benchmark::State& state) {
+ const absl::TimeZone tz =
+ absl::time_internal::LoadTimeZone("America/Los_Angeles");
+ absl::Time t = absl::FromUnixSeconds(1384569027);
+ absl::Time t2 = absl::FromUnixSeconds(1418962578);
+ while (state.KeepRunning()) {
+ std::swap(t, t2);
+ t += absl::Seconds(1);
+ benchmark::DoNotOptimize(t.In(tz));
+ }
+}
+BENCHMARK(BM_Time_ToDateTime_Absl);
+
+void BM_Time_ToDateTime_Libc(benchmark::State& state) {
+ // No timezone support, so just use localtime.
+ time_t t = 1384569027;
+ time_t t2 = 1418962578;
+ while (state.KeepRunning()) {
+ std::swap(t, t2);
+ t += 1;
+ struct tm tm;
+#if !defined(_WIN32)
+ benchmark::DoNotOptimize(localtime_r(&t, &tm));
+#else // _WIN32
+ benchmark::DoNotOptimize(localtime_s(&tm, &t));
+#endif // _WIN32
+ }
+}
+BENCHMARK(BM_Time_ToDateTime_Libc);
+
+void BM_Time_ToDateTimeUTC_Absl(benchmark::State& state) {
+ const absl::TimeZone tz = absl::UTCTimeZone();
+ absl::Time t = absl::FromUnixSeconds(1384569027);
+ while (state.KeepRunning()) {
+ t += absl::Seconds(1);
+ benchmark::DoNotOptimize(t.In(tz));
+ }
+}
+BENCHMARK(BM_Time_ToDateTimeUTC_Absl);
+
+void BM_Time_ToDateTimeUTC_Libc(benchmark::State& state) {
+ time_t t = 1384569027;
+ while (state.KeepRunning()) {
+ t += 1;
+ struct tm tm;
+#if !defined(_WIN32)
+ benchmark::DoNotOptimize(gmtime_r(&t, &tm));
+#else // _WIN32
+ benchmark::DoNotOptimize(gmtime_s(&tm, &t));
+#endif // _WIN32
+ }
+}
+BENCHMARK(BM_Time_ToDateTimeUTC_Libc);
+
+//
+// FromUnixMicros
+//
+
+void BM_Time_FromUnixMicros(benchmark::State& state) {
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::FromUnixMicros(i));
+ ++i;
+ }
+}
+BENCHMARK(BM_Time_FromUnixMicros);
+
+void BM_Time_ToUnixNanos(benchmark::State& state) {
+ const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(ToUnixNanos(t));
+ }
+}
+BENCHMARK(BM_Time_ToUnixNanos);
+
+void BM_Time_ToUnixMicros(benchmark::State& state) {
+ const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(ToUnixMicros(t));
+ }
+}
+BENCHMARK(BM_Time_ToUnixMicros);
+
+void BM_Time_ToUnixMillis(benchmark::State& state) {
+ const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(ToUnixMillis(t));
+ }
+}
+BENCHMARK(BM_Time_ToUnixMillis);
+
+void BM_Time_ToUnixSeconds(benchmark::State& state) {
+ const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToUnixSeconds(t));
+ }
+}
+BENCHMARK(BM_Time_ToUnixSeconds);
+
+//
+// FromDateTime
+//
+// In each "FromDateTime" benchmark we switch between two YMDhms
+// values separated by at least one transition in order to defeat any
+// internal caching of previous results (e.g., see time_local_hint_).
+//
+// The "UTC" variants use UTC instead of the Google/local time zone.
+// The "Day0" variants require normalization of the day of month.
+//
+
+void BM_Time_FromDateTime_Absl(benchmark::State& state) {
+ const absl::TimeZone tz =
+ absl::time_internal::LoadTimeZone("America/Los_Angeles");
+ int i = 0;
+ while (state.KeepRunning()) {
+ if ((i & 1) == 0) {
+ absl::FromDateTime(2014, 12, 18, 20, 16, 18, tz);
+ } else {
+ absl::FromDateTime(2013, 11, 15, 18, 30, 27, tz);
+ }
+ ++i;
+ }
+}
+BENCHMARK(BM_Time_FromDateTime_Absl);
+
+void BM_Time_FromDateTime_Libc(benchmark::State& state) {
+ // No timezone support, so just use localtime.
+ int i = 0;
+ while (state.KeepRunning()) {
+ struct tm tm;
+ if ((i & 1) == 0) {
+ tm.tm_year = 2014 - 1900;
+ tm.tm_mon = 12 - 1;
+ tm.tm_mday = 18;
+ tm.tm_hour = 20;
+ tm.tm_min = 16;
+ tm.tm_sec = 18;
+ } else {
+ tm.tm_year = 2013 - 1900;
+ tm.tm_mon = 11 - 1;
+ tm.tm_mday = 15;
+ tm.tm_hour = 18;
+ tm.tm_min = 30;
+ tm.tm_sec = 27;
+ }
+ tm.tm_isdst = -1;
+ mktime(&tm);
+ ++i;
+ }
+}
+BENCHMARK(BM_Time_FromDateTime_Libc);
+
+void BM_Time_FromDateTimeUTC_Absl(benchmark::State& state) {
+ const absl::TimeZone tz = absl::UTCTimeZone();
+ while (state.KeepRunning()) {
+ FromDateTime(2014, 12, 18, 20, 16, 18, tz);
+ }
+}
+BENCHMARK(BM_Time_FromDateTimeUTC_Absl);
+
+void BM_Time_FromDateTimeDay0_Absl(benchmark::State& state) {
+ const absl::TimeZone tz =
+ absl::time_internal::LoadTimeZone("America/Los_Angeles");
+ int i = 0;
+ while (state.KeepRunning()) {
+ if ((i & 1) == 0) {
+ absl::FromDateTime(2014, 12, 0, 20, 16, 18, tz);
+ } else {
+ absl::FromDateTime(2013, 11, 0, 18, 30, 27, tz);
+ }
+ ++i;
+ }
+}
+BENCHMARK(BM_Time_FromDateTimeDay0_Absl);
+
+void BM_Time_FromDateTimeDay0_Libc(benchmark::State& state) {
+ // No timezone support, so just use localtime.
+ int i = 0;
+ while (state.KeepRunning()) {
+ struct tm tm;
+ if ((i & 1) == 0) {
+ tm.tm_year = 2014 - 1900;
+ tm.tm_mon = 12 - 1;
+ tm.tm_mday = 0;
+ tm.tm_hour = 20;
+ tm.tm_min = 16;
+ tm.tm_sec = 18;
+ } else {
+ tm.tm_year = 2013 - 1900;
+ tm.tm_mon = 11 - 1;
+ tm.tm_mday = 0;
+ tm.tm_hour = 18;
+ tm.tm_min = 30;
+ tm.tm_sec = 27;
+ }
+ tm.tm_isdst = -1;
+ mktime(&tm);
+ ++i;
+ }
+}
+BENCHMARK(BM_Time_FromDateTimeDay0_Libc);
+
+//
+// To/FromTimespec
+//
+
+void BM_Time_ToTimespec(benchmark::State& state) {
+ absl::Time now = absl::Now();
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToTimespec(now));
+ }
+}
+BENCHMARK(BM_Time_ToTimespec);
+
+void BM_Time_FromTimespec(benchmark::State& state) {
+ timespec ts = absl::ToTimespec(absl::Now());
+ while (state.KeepRunning()) {
+ if (++ts.tv_nsec == 1000 * 1000 * 1000) {
+ ++ts.tv_sec;
+ ts.tv_nsec = 0;
+ }
+ benchmark::DoNotOptimize(absl::TimeFromTimespec(ts));
+ }
+}
+BENCHMARK(BM_Time_FromTimespec);
+
+//
+// Comparison with InfiniteFuture/Past
+//
+
+void BM_Time_InfiniteFuture(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::InfiniteFuture());
+ }
+}
+BENCHMARK(BM_Time_InfiniteFuture);
+
+void BM_Time_InfinitePast(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::InfinitePast());
+ }
+}
+BENCHMARK(BM_Time_InfinitePast);
+
+} // namespace
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