2 * Copyright 2016 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/Logging.h>
19 #include <folly/Benchmark.h>
23 BENCHMARK(skip_overhead, iter) {
24 auto prev = FLAGS_minloglevel;
25 FLAGS_minloglevel = 2;
27 for (unsigned i = 0; i < iter; ++i) {
28 FB_LOG_EVERY_MS(INFO, 1000) << "every 1s";
31 FLAGS_minloglevel = prev;
34 BENCHMARK(dev_null_log_overhead, iter) {
35 auto prev = FLAGS_minloglevel;
36 FLAGS_minloglevel = 2;
38 for (unsigned i = 0; i < iter; ++i) {
39 FB_LOG_EVERY_MS(INFO, -1) << "every -1ms";
42 FLAGS_minloglevel = prev;
45 // ============================================================================
46 // folly/test/LoggingTest.cpp relative time/iter iters/s
47 // ============================================================================
48 // skip_overhead 36.37ns 27.49M
49 // dev_null_log_overhead 2.61us 382.57K
50 // ============================================================================
52 int main(int argc, char** argv) {
53 gflags::ParseCommandLineFlags(&argc, &argv, true);
54 folly::runBenchmarks();