1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include <memory>
11 
12 #include "benchmark/benchmark.h"
13 
BM_SharedPtrCreateDestroy(benchmark::State & st)14 static void BM_SharedPtrCreateDestroy(benchmark::State& st) {
15   while (st.KeepRunning()) {
16     auto sp = std::make_shared<int>(42);
17     benchmark::DoNotOptimize(sp.get());
18   }
19 }
20 BENCHMARK(BM_SharedPtrCreateDestroy);
21 
BM_SharedPtrIncDecRef(benchmark::State & st)22 static void BM_SharedPtrIncDecRef(benchmark::State& st) {
23   auto sp = std::make_shared<int>(42);
24   benchmark::DoNotOptimize(sp.get());
25   while (st.KeepRunning()) {
26     std::shared_ptr<int> sp2(sp);
27     benchmark::ClobberMemory();
28   }
29 }
30 BENCHMARK(BM_SharedPtrIncDecRef);
31 
BM_WeakPtrIncDecRef(benchmark::State & st)32 static void BM_WeakPtrIncDecRef(benchmark::State& st) {
33   auto sp = std::make_shared<int>(42);
34   benchmark::DoNotOptimize(sp.get());
35   while (st.KeepRunning()) {
36     std::weak_ptr<int> wp(sp);
37     benchmark::ClobberMemory();
38   }
39 }
40 BENCHMARK(BM_WeakPtrIncDecRef);
41 
42 BENCHMARK_MAIN();
43