View difference between Paste ID: <a href="/cZ0YymnV">cZ0YymnV</a> and <a href="/6FwBfg4k">6FwBfg4k</a>

#include <cstdint>
1		#include <cstdint>
2		#include <Windows.h>
3		#include <iostream>
4
5		class Foo final
6		{
7		public:
8		Foo() {}
9		~Foo() {}
10
11		void Draw(char* arr, uint32_t ind)
12		{
13		arr[ind] = char(100);
14		}
15		};
16
17		class Bar final
18		{
19		public:
20		Bar() {}
21		~Bar() {}
22
23		void Draw(char* arr, uint32_t ind)
24		{
25		arr[ind] = char(200);
26		}
27		};
28
29		//===================================================================================================================================
30		#define MODE_FOO 0
31		#define MODE_BAR 1
32
33		union FooBar
34		{
35		Foo* foo;
36		Bar* bar;
37		};
38
39		void _DrawFoo(FooBar dr, char* arr, uint32_t ind)
40		{
41		return dr.foo->Draw(arr, ind);
42		}
43
44		void _DrawBar(FooBar dr, char* arr, uint32_t ind)
45		{
46		return dr.bar->Draw(arr, ind);
47		}
48
49		void(__Draw)(FooBar dr, char arr, uint32_t ind);
50
51		class Unvirtual
52		{
53		public:
54		Unvirtual(int mode)
55		{
56		switch(mode)
57		{
58		case 0:
59		mFooBar.foo = new Foo();
60		__Draw = _DrawFoo;
61		break;
62		default:
63		mFooBar.bar = new Bar();
64		__Draw = _DrawBar;
65		break;
66		}
67		}
68
69		~Unvirtual() {}
70
71		void Draw(char* arr, uint32_t ind)
72		{
73		return __Draw(mFooBar, arr, ind);
74		}
75
76		private:
77		FooBar mFooBar;
78		};
79
80		class Virtual
81		{
82		public:
83		Virtual() {}
84		~Virtual() {}
85
86		virtual void Draw(char*, uint32_t) = 0;
87		};
88
89		class FooVirt: public Virtual
90		{
91		public:
92		FooVirt()
93		{
94		mFoo = new Foo();
95		}
96		~FooVirt()
97		{
98		delete mFoo;
99		}
100
101		void Draw(char* arr, uint32_t ind) override
102		{
103		return mFoo->Draw(arr, ind);
104		}
105
106		private:
107		Foo* mFoo;
108		};
109
110		class BarVirt: public Virtual
111		{
112		public:
113		BarVirt()
114		{
115		mBar = new Bar();
116		}
117		~BarVirt()
118		{
119		delete mBar;
120		}
121
122		void Draw(char* arr, uint32_t ind) override
123		{
124		return mBar->Draw(arr, ind);
125		}
126
127		private:
128		Bar* mBar;
129		};
130
131		int main()
132		{
133	-	char *aaa = new char[1'000'000'000];
133	+	char *aaa = new char[1000000000];
134
135		__int64 freq;
136		QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
137		__int64 start, end;
138
139		Unvirtual unvirt(MODE_FOO);
140		QueryPerformanceCounter((LARGE_INTEGER*)&start);
141	-	for(uint32_t i = 0; i < 1'000'000'000; i++)
141	+	for(uint32_t i = 0; i < 1000000000; i++)
142		{
143		unvirt.Draw(aaa, i);
144		}
145		QueryPerformanceCounter((LARGE_INTEGER*)&end);
146
147		double t1 = (double)(end - start) / freq;
148
149		Virtual* virt = new FooVirt();
150		QueryPerformanceCounter((LARGE_INTEGER*)&start);
151	-	for(uint32_t i = 0; i < 1'000'000'000; i++)
151	+	for(uint32_t i = 0; i < 1000000000; i++)
152		{
153		virt->Draw(aaa, i);
154		}
155		QueryPerformanceCounter((LARGE_INTEGER*)&end);
156
157		double t2 = (double)(end - start) / freq;
158
159		std::cout << "Unvirtual time: " << t1 << std::endl;
160		std::cout << "Virtual time: " << t2 << std::endl;
161		std::cin.get();
162
163		delete[] aaa;
164		}