blob: 3d3cd9d5c42cd7f892f48a02e7c1fcb21a388faf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// Copyright 2018 The Abseil Authors.
// 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 "absl/time/clock.h"
#if !defined(_WIN32)
#include <sys/time.h>
#endif // _WIN32
#include <cstdio>
#include "absl/base/internal/cycleclock.h"
#include "benchmark/benchmark.h"
namespace {
void BM_Clock_Now_AbslTime(benchmark::State& state) {
while (state.KeepRunning()) {
benchmark::DoNotOptimize(absl::Now());
}
}
BENCHMARK(BM_Clock_Now_AbslTime);
void BM_Clock_Now_GetCurrentTimeNanos(benchmark::State& state) {
while (state.KeepRunning()) {
benchmark::DoNotOptimize(absl::GetCurrentTimeNanos());
}
}
BENCHMARK(BM_Clock_Now_GetCurrentTimeNanos);
void BM_Clock_Now_AbslTime_ToUnixNanos(benchmark::State& state) {
while (state.KeepRunning()) {
benchmark::DoNotOptimize(absl::ToUnixNanos(absl::Now()));
}
}
BENCHMARK(BM_Clock_Now_AbslTime_ToUnixNanos);
void BM_Clock_Now_CycleClock(benchmark::State& state) {
while (state.KeepRunning()) {
benchmark::DoNotOptimize(absl::base_internal::CycleClock::Now());
}
}
BENCHMARK(BM_Clock_Now_CycleClock);
#if !defined(_WIN32)
static void BM_Clock_Now_gettimeofday(benchmark::State& state) {
struct timeval tv;
while (state.KeepRunning()) {
benchmark::DoNotOptimize(gettimeofday(&tv, nullptr));
}
}
BENCHMARK(BM_Clock_Now_gettimeofday);
static void BM_Clock_Now_clock_gettime(benchmark::State& state) {
struct timespec ts;
while (state.KeepRunning()) {
benchmark::DoNotOptimize(clock_gettime(CLOCK_REALTIME, &ts));
}
}
BENCHMARK(BM_Clock_Now_clock_gettime);
#endif // _WIN32
} // namespace
|
