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- /*
- * Copyright 2015-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/io/async/EventBase.h>
- #include <folly/portability/GFlags.h>
- using namespace folly;
- class CountedLoopCallback : public EventBase::LoopCallback {
- public:
- CountedLoopCallback(EventBase* eventBase, unsigned int count)
- : eventBase_(eventBase), count_(count) {}
- void runLoopCallback() noexcept override {
- --count_;
- if (count_ > 0) {
- eventBase_->runInLoop(this);
- }
- }
- private:
- EventBase* eventBase_;
- unsigned int count_;
- };
- BENCHMARK(timeMeasurementsOn, n) {
- EventBase eventBase;
- while (n--) {
- CountedLoopCallback c(&eventBase, 10);
- eventBase.runInLoop(&c);
- eventBase.loop();
- }
- }
- BENCHMARK_RELATIVE(timeMeasurementsOff, n) {
- EventBase eventBase(/* enableTimeMeasurement */ false);
- while (n--) {
- CountedLoopCallback c(&eventBase, 10);
- eventBase.runInLoop(&c);
- eventBase.loop();
- }
- }
- /**
- * --bm_min_iters=1000000
- *
- * ============================================================================
- * folly/io/async/test/EventBaseBenchmark.cpp relative time/iter iters/s
- * ============================================================================
- * timeMeasurementsOn 1.25us 798.33K
- * timeMeasurementsOff 214.47% 584.04ns 1.71M
- * ============================================================================
- */
- int main(int argc, char** argv) {
- gflags::ParseCommandLineFlags(&argc, &argv, true);
- runBenchmarks();
- }
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