2 * Copyright 2017 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>
21 BENCHMARK(skip_overhead, iter) {
22 auto prev = FLAGS_minloglevel;
23 FLAGS_minloglevel = 2;
25 for (unsigned i = 0; i < iter; ++i) {
26 FB_LOG_EVERY_MS(INFO, 1000) << "every 1s";
29 FLAGS_minloglevel = prev;
32 BENCHMARK(dev_null_log_overhead, iter) {
33 auto prev = FLAGS_minloglevel;
34 FLAGS_minloglevel = 2;
36 for (unsigned i = 0; i < iter; ++i) {
37 FB_LOG_EVERY_MS(INFO, -1) << "every -1ms";
40 FLAGS_minloglevel = prev;
43 // ============================================================================
44 // folly/test/LoggingTest.cpp relative time/iter iters/s
45 // ============================================================================
46 // skip_overhead 36.37ns 27.49M
47 // dev_null_log_overhead 2.61us 382.57K
48 // ============================================================================
50 int main(int argc, char** argv) {
51 gflags::ParseCommandLineFlags(&argc, &argv, true);
52 folly::runBenchmarks();