2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/Benchmark.h>
18 #include <folly/wangle/rx/Observer.h>
19 #include <folly/wangle/rx/Subject.h>
20 #include <gflags/gflags.h>
22 using namespace folly::wangle;
23 using folly::BenchmarkSuspender;
25 static std::unique_ptr<Observer<int>> makeObserver() {
26 return Observer<int>::create([&] (int x) {});
29 void subscribeImpl(uint iters, int N, bool countUnsubscribe) {
30 for (uint iter = 0; iter < iters; iter++) {
31 BenchmarkSuspender bs;
33 std::vector<std::unique_ptr<Observer<int>>> observers;
34 std::vector<Subscription<int>> subscriptions;
35 subscriptions.reserve(N);
36 for (int i = 0; i < N; i++) {
37 observers.push_back(makeObserver());
40 for (int i = 0; i < N; i++) {
41 subscriptions.push_back(subject.subscribe(std::move(observers[i])));
43 if (countUnsubscribe) {
44 subscriptions.clear();
50 void subscribeAndUnsubscribe(uint iters, int N) {
51 subscribeImpl(iters, N, true);
54 void subscribe(uint iters, int N) {
55 subscribeImpl(iters, N, false);
58 void observe(uint iters, int N) {
59 for (uint iter = 0; iter < iters; iter++) {
60 BenchmarkSuspender bs;
62 std::vector<std::unique_ptr<Observer<int>>> observers;
63 for (int i = 0; i < N; i++) {
64 observers.push_back(makeObserver());
67 for (int i = 0; i < N; i++) {
68 subject.observe(std::move(observers[i]));
74 void inlineObserve(uint iters, int N) {
75 for (uint iter = 0; iter < iters; iter++) {
76 BenchmarkSuspender bs;
78 std::vector<Observer<int>*> observers;
79 for (int i = 0; i < N; i++) {
80 observers.push_back(makeObserver().release());
83 for (int i = 0; i < N; i++) {
84 subject.observe(observers[i]);
87 for (int i = 0; i < N; i++) {
93 void notifySubscribers(uint iters, int N) {
94 for (uint iter = 0; iter < iters; iter++) {
95 BenchmarkSuspender bs;
97 std::vector<std::unique_ptr<Observer<int>>> observers;
98 std::vector<Subscription<int>> subscriptions;
99 subscriptions.reserve(N);
100 for (int i = 0; i < N; i++) {
101 observers.push_back(makeObserver());
103 for (int i = 0; i < N; i++) {
104 subscriptions.push_back(subject.subscribe(std::move(observers[i])));
112 void notifyInlineObservers(uint iters, int N) {
113 for (uint iter = 0; iter < iters; iter++) {
114 BenchmarkSuspender bs;
115 Subject<int> subject;
116 std::vector<Observer<int>*> observers;
117 for (int i = 0; i < N; i++) {
118 observers.push_back(makeObserver().release());
120 for (int i = 0; i < N; i++) {
121 subject.observe(observers[i]);
129 BENCHMARK_PARAM(subscribeAndUnsubscribe, 1);
130 BENCHMARK_RELATIVE_PARAM(subscribe, 1);
131 BENCHMARK_RELATIVE_PARAM(observe, 1);
132 BENCHMARK_RELATIVE_PARAM(inlineObserve, 1);
134 BENCHMARK_DRAW_LINE();
136 BENCHMARK_PARAM(subscribeAndUnsubscribe, 1000);
137 BENCHMARK_RELATIVE_PARAM(subscribe, 1000);
138 BENCHMARK_RELATIVE_PARAM(observe, 1000);
139 BENCHMARK_RELATIVE_PARAM(inlineObserve, 1000);
141 BENCHMARK_DRAW_LINE();
143 BENCHMARK_PARAM(notifySubscribers, 1);
144 BENCHMARK_RELATIVE_PARAM(notifyInlineObservers, 1);
146 BENCHMARK_DRAW_LINE();
148 BENCHMARK_PARAM(notifySubscribers, 1000);
149 BENCHMARK_RELATIVE_PARAM(notifyInlineObservers, 1000);
151 int main(int argc, char** argv) {
152 gflags::ParseCommandLineFlags(&argc, &argv, true);
153 folly::runBenchmarks();