1 #include <iostream>
2 #include <chrono>
3 #include <array>
4
5 class Timer
6 {
7 public:
8 Timer()
9 {
10 m_StartTimePoint = std::chrono::high_resolution_clock::now();
11 }
12
13 ~Timer()
14 {
15 Stop();
16 }
17
18 void Stop()
19 {
20 auto endTimePoint = std::chrono::high_resolution_clock::now();
21 auto start = std::chrono::time_point_cast<std::chrono::milliseconds>(m_StartTimePoint).time_since_epoch().count();
22 auto end = std::chrono::time_point_cast<std::chrono::milliseconds>(endTimePoint).time_since_epoch().count();
23
24 auto duration = end - start;
25
26 double ms = duration * 0.001;
27
28 std::cout << duration << "us (" << ms << "ms)
";
29 }
30
31 private:
32 std::chrono::time_point<std::chrono::high_resolution_clock> m_StartTimePoint;
33
34 };
35
36 int main() {
37 struct Vector3
38 {
39 float x, y, z;
40 };
41
42
43 {
44 std::array<std::shared_ptr<Vector3>, 100000> sharedPtr;
45 Timer timer;
46 {
47 for (int i = 0; i < sharedPtr.size(); i++)
48 {
49 sharedPtr[i] = std::shared_ptr<Vector3>(new Vector3());
50 }
51 }
52 }
53
54 {
55 std::array<std::shared_ptr<Vector3>, 100000> sharedPtr;
56 {
57 Timer timer;
58 for (int i = 0; i < sharedPtr.size(); i++)
59 {
60 sharedPtr[i] = std::make_shared<Vector3>();
61 }
62 }
63 }
64
65
66 {
67 std::array<std::unique_ptr<Vector3>, 100000> uniquePtr;
68 {
69 Timer timer;
70 for (int i = 0; i < uniquePtr.size(); i++)
71 {
72 uniquePtr[i] = std::make_unique<Vector3>();
73 }
74 }
75 }
76
77 return 0;
78 }
