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authorGravatar Abseil Team <absl-team@google.com>2019-05-08 14:20:43 -0700
committerGravatar Eric Fiselier <eric@efcs.ca>2019-05-08 18:40:30 -0400
commit27c2f6e2f3b5929fbd322b0f0ca392eb02efd9f8 (patch)
treeda69e1d0f4cddb3b56f6d7af4ef28414641dbe0a /absl/time
parentaa468ad75539619b47979911297efbb629c52e44 (diff)
Export of internal Abseil changes.
-- 9fa04b5fb4b6aeb47226b9095b3bc36a53669c39 by Abseil Team <absl-team@google.com>: Release types/compare.h, which contains stand ins for three-way comparison result types from C++20. Use absl::weak_ordering for a three-way comparator in test-instance-tracker.h. PiperOrigin-RevId: 247290078 -- 70a762f4eb35ea1d5a5fcb3274a8086824a0b82c by Derek Mauro <dmauro@google.com>: Upgrade linux_clang-latest builds to LLVM r356814 and Bazel 0.25.0 PiperOrigin-RevId: 247250176 -- f305cd5c36561e4dbb69eb87568553ae5badcb15 by CJ Johnson <johnsoncj@google.com>: Remove argument deduction based on template template argument in InlinedVector/Storage PiperOrigin-RevId: 247232334 -- 2cab8e426838baceb7d08edb313416480d26aa5b by Eric Fiselier <ericwf@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 247140132 GitOrigin-RevId: 9fa04b5fb4b6aeb47226b9095b3bc36a53669c39 Change-Id: I373a7d9bc90befa2a9f06555cb8703610c0313b9
Diffstat (limited to 'absl/time')
-rw-r--r--absl/time/internal/cctz/include/cctz/civil_time_detail.h38
-rw-r--r--absl/time/internal/cctz/src/cctz_benchmark.cc50
2 files changed, 84 insertions, 4 deletions
diff --git a/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
index bb191b3f..3e243403 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
@@ -555,13 +555,43 @@ CONSTEXPR_F weekday get_weekday(const civil_day& cd) noexcept {
////////////////////////////////////////////////////////////////////////
CONSTEXPR_F civil_day next_weekday(civil_day cd, weekday wd) noexcept {
- do { cd += 1; } while (get_weekday(cd) != wd);
- return cd;
+ CONSTEXPR_D weekday k_weekdays_forw[14] = {
+ weekday::monday, weekday::tuesday, weekday::wednesday,
+ weekday::thursday, weekday::friday, weekday::saturday,
+ weekday::sunday, weekday::monday, weekday::tuesday,
+ weekday::wednesday, weekday::thursday, weekday::friday,
+ weekday::saturday, weekday::sunday,
+ };
+ weekday base = get_weekday(cd);
+ for (int i = 0;; ++i) {
+ if (base == k_weekdays_forw[i]) {
+ for (int j = i + 1;; ++j) {
+ if (wd == k_weekdays_forw[j]) {
+ return cd + (j - i);
+ }
+ }
+ }
+ }
}
CONSTEXPR_F civil_day prev_weekday(civil_day cd, weekday wd) noexcept {
- do { cd -= 1; } while (get_weekday(cd) != wd);
- return cd;
+ CONSTEXPR_D weekday k_weekdays_back[14] = {
+ weekday::sunday, weekday::saturday, weekday::friday,
+ weekday::thursday, weekday::wednesday, weekday::tuesday,
+ weekday::monday, weekday::sunday, weekday::saturday,
+ weekday::friday, weekday::thursday, weekday::wednesday,
+ weekday::tuesday, weekday::monday,
+ };
+ weekday base = get_weekday(cd);
+ for (int i = 0;; ++i) {
+ if (base == k_weekdays_back[i]) {
+ for (int j = i + 1;; ++j) {
+ if (wd == k_weekdays_back[j]) {
+ return cd - (j - i);
+ }
+ }
+ }
+ }
}
CONSTEXPR_F int get_yearday(const civil_day& cd) noexcept {
diff --git a/absl/time/internal/cctz/src/cctz_benchmark.cc b/absl/time/internal/cctz/src/cctz_benchmark.cc
index 445366ea..a40f504e 100644
--- a/absl/time/internal/cctz/src/cctz_benchmark.cc
+++ b/absl/time/internal/cctz/src/cctz_benchmark.cc
@@ -47,6 +47,56 @@ void BM_Step_Days(benchmark::State& state) {
}
BENCHMARK(BM_Step_Days);
+void BM_GetWeekday(benchmark::State& state) {
+ const cctz::civil_day c(2014, 8, 22);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(cctz::get_weekday(c));
+ }
+}
+BENCHMARK(BM_GetWeekday);
+
+void BM_NextWeekday(benchmark::State& state) {
+ const cctz::civil_day kStart(2014, 8, 22);
+ const cctz::civil_day kDays[7] = {
+ kStart + 0, kStart + 1, kStart + 2, kStart + 3,
+ kStart + 4, kStart + 5, kStart + 6,
+ };
+ const cctz::weekday kWeekdays[7] = {
+ cctz::weekday::monday, cctz::weekday::tuesday, cctz::weekday::wednesday,
+ cctz::weekday::thursday, cctz::weekday::friday, cctz::weekday::saturday,
+ cctz::weekday::sunday,
+ };
+ while (state.KeepRunningBatch(7 * 7)) {
+ for (const auto from : kDays) {
+ for (const auto to : kWeekdays) {
+ benchmark::DoNotOptimize(cctz::next_weekday(from, to));
+ }
+ }
+ }
+}
+BENCHMARK(BM_NextWeekday);
+
+void BM_PrevWeekday(benchmark::State& state) {
+ const cctz::civil_day kStart(2014, 8, 22);
+ const cctz::civil_day kDays[7] = {
+ kStart + 0, kStart + 1, kStart + 2, kStart + 3,
+ kStart + 4, kStart + 5, kStart + 6,
+ };
+ const cctz::weekday kWeekdays[7] = {
+ cctz::weekday::monday, cctz::weekday::tuesday, cctz::weekday::wednesday,
+ cctz::weekday::thursday, cctz::weekday::friday, cctz::weekday::saturday,
+ cctz::weekday::sunday,
+ };
+ while (state.KeepRunningBatch(7 * 7)) {
+ for (const auto from : kDays) {
+ for (const auto to : kWeekdays) {
+ benchmark::DoNotOptimize(cctz::prev_weekday(from, to));
+ }
+ }
+ }
+}
+BENCHMARK(BM_PrevWeekday);
+
const char RFC3339_full[] = "%Y-%m-%dT%H:%M:%E*S%Ez";
const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez";