time_benchmark.cpp revision 7634db5a0657129225869c3650a992f9cbe82fe4 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
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
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17#include "benchmark.h"
18
19#include <time.h>
20
21#if defined(__BIONIC__)
22
23// Used by the horrible android.text.format.Time class, which is used by Calendar. http://b/8270865.
24extern "C" void localtime_tz(const time_t* const timep, struct tm* tmp, const char* tz);
25
26static void BM_time_localtime_tz(int iters) {
27  StartBenchmarkTiming();
28
29  time_t now(time(NULL));
30  tm broken_down_time;
31  for (int i = 0; i < iters; ++i) {
32    localtime_tz(&now, &broken_down_time, "Europe/Berlin");
33  }
34
35  StopBenchmarkTiming();
36}
37BENCHMARK(BM_time_localtime_tz);
38
39#endif
40
41static void BM_time_clock_gettime(int iters) {
42  StartBenchmarkTiming();
43
44  struct timespec t;
45  for (int i = 0; i < iters; ++i) {
46    clock_gettime(CLOCK_MONOTONIC, &t);
47  }
48
49  StopBenchmarkTiming();
50}
51BENCHMARK(BM_time_clock_gettime);
52