CollectAll benchmark

Reviewed By: yfeldblum

Differential Revision: D17892633

fbshipit-source-id: 1b4b2cffb040b1abf709ea2ccd4015426398dda0

folly/experimental/coro/test/CollectAllBenchmark.cpp

+/*
+ * Copyright 2018-present Facebook, Inc.
+ *
+ * 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 <folly/Benchmark.h>
+#include <folly/executors/CPUThreadPoolExecutor.h>
+#include <folly/experimental/coro/BlockingWait.h>
+#include <folly/experimental/coro/Collect.h>
+#include <folly/experimental/coro/Generator.h>
+#include <folly/experimental/coro/Task.h>
+#include <folly/synchronization/Baton.h>
+
+void doWork() {}
+
+folly::CPUThreadPoolExecutor executor(4);
+
+void collectAllFuture(size_t batchSize) {
+  std::vector<folly::Future<folly::Unit>> futures;
+  for (size_t i = 0; i < batchSize; ++i) {
+    futures.emplace_back(folly::via(&executor, [] { doWork(); }));
+  }
+  folly::collectAll(std::move(futures)).get();
+}
+
+void collectAllFutureInline(size_t batchSize) {
+  std::vector<folly::Future<folly::Unit>> futures;
+  for (size_t i = 0; i < batchSize; ++i) {
+    futures.emplace_back(folly::via(&executor, [] { doWork(); })
+                             .via(&folly::InlineExecutor::instance()));
+  }
+  folly::collectAll(std::move(futures)).get();
+}
+
+void collectAllSemiFuture(size_t batchSize) {
+  std::vector<folly::SemiFuture<folly::Unit>> futures;
+  for (size_t i = 0; i < batchSize; ++i) {
+    futures.emplace_back(folly::via(&executor, [] { doWork(); }));
+  }
+  folly::collectAllSemiFuture(std::move(futures)).get();
+}
+
+folly::coro::Task<void> co_doWork() {
+  co_await[]()->folly::coro::Task<void> {
+    doWork();
+    co_return;
+  }
+  ().scheduleOn(&executor);
+}
+
+void collectAllCoro(size_t batchSize) {
+  folly::coro::blockingWait([&]() -> folly::coro::Task<void> {
+    co_await folly::coro::collectAllRange(
+        [&]() -> folly::coro::Generator<folly::coro::Task<void>&&> {
+          for (size_t i = 0; i < batchSize; ++i) {
+            co_yield co_doWork();
+          }
+        }());
+  }());
+}
+
+void collectAllBaton(size_t batchSize) {
+  folly::Baton<> baton;
+  std::shared_ptr<folly::Baton<>> batonGuard(
+      &baton, [](folly::Baton<>* baton) { baton->post(); });
+  for (size_t i = 0; i < batchSize; ++i) {
+    executor.add([batonGuard]() { doWork(); });
+  }
+  batonGuard.reset();
+  baton.wait();
+}
+
+BENCHMARK(collectAllFuture10000, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllFuture(10000);
+  }
+}
+
+BENCHMARK(collectAllFutureInline10000, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllFutureInline(10000);
+  }
+}
+
+BENCHMARK(collectAllSemiFuture10000, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllSemiFuture(10000);
+  }
+}
+
+BENCHMARK(collectAllCoro10000, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllCoro(10000);
+  }
+}
+
+BENCHMARK(collectAllBaton10000, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllBaton(10000);
+  }
+}
+
+BENCHMARK(collectAllFuture100, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllFuture(100);
+  }
+}
+
+BENCHMARK(collectAllFutureInline100, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllFutureInline(100);
+  }
+}
+
+BENCHMARK(collectAllSemiFuture100, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllSemiFuture(100);
+  }
+}
+
+BENCHMARK(collectAllCoro100, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllCoro(100);
+  }
+}
+
+BENCHMARK(collectAllBaton100, iters) {
+  for (size_t i = 0; i < iters; ++i) {
+    collectAllBaton(100);
+  }
+}
+
+int main(int argc, char** argv) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  folly::runBenchmarks();
+  return 0;
+}