wy/performance.cpp at main · Mergesium/wy · GitHub

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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
/////////////////////////////////////////////////////////////////////////////////
// This file is a C++ wrapper around wyhash:
// https://github.com/wangyi-fudan/wyhash
//
// Copyright (c) 2022 by Alain Espinosa.
/////////////////////////////////////////////////////////////////////////////////

// include the required header
#include <wy.hpp>
#include <chrono>
#include <iostream>
#include <format>

void main_rand()
{
	constexpr size_t numIter = 1'000'000'000;
	constexpr size_t numIterStream = 10'000'000;
	// Create a pseudo-random generator
	wy::rand r;
	uint64_t no_op = 0;// variable to restrict compiler optimizations
	double no_opd = 0;

	std::cout << "--------------------------------------------------" << std::endl;
	std::cout << "Random Performance" << std::endl;
	std::cout << "--------------------------------------------------" << std::endl;

	//////////////////////////////////////////////////////////////////////////////////////
	// Common operation
	//////////////////////////////////////////////////////////////////////////////////////
	auto start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= r();// Generate a random number
	auto stop = std::chrono::high_resolution_clock::now();
	auto duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Random              : {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	std::cout << "--------------------------------------------------" << std::endl;
	//////////////////////////////////////////////////////////////////////////////////////
	// Uniform operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_opd += r.uniform_dist();// Generate a random number
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Uniform [0, 1)      : {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	//////////////////////////////////////////////////////////////////////////////////////
	// Uniform operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_opd += r.uniform_dist(5.6, 11.7);// Generate a random number
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Uniform [min, max)  : {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

#if !WYHASH_32BIT_MUM
	//////////////////////////////////////////////////////////////////////////////////////
	// Uniform operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= r.uniform_dist(5000);// Generate a random number
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Uniform [0, k)      : {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	std::cout << "--------------------------------------------------" << std::endl;
#endif

	//////////////////////////////////////////////////////////////////////////////////////
	// Gaussian operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_opd += r.gaussian_dist();// Generate a random number
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Gaussian [0, 1]     : {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	//////////////////////////////////////////////////////////////////////////////////////
	// Gaussian operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_opd += r.gaussian_dist(1.2, 2.5);// Generate a random number
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Gaussian [mean, std]: {}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	std::cout << "--------------------------------------------------" << std::endl;

	//////////////////////////////////////////////////////////////////////////////////////
	// Stream operation
	//////////////////////////////////////////////////////////////////////////////////////
	std::vector<uint8_t> vec(4096, 0);
	constexpr double GiB2GB = 1'000'000. / (1024 * 1024);// Constant to convert to base-2 GB definition
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIterStream; i++)
	{
		r.generate_stream(vec, 1024);// Generate a stream of random numbers
		no_op ^= vec[0];
	}
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Stream  [1024]      : {:.1f} GB/sec\n", GiB2GB * numIterStream / duration.count());// Show performance on GB per second

	//////////////////////////////////////////////////////////////////////////////////////
	// Stream operation
	//////////////////////////////////////////////////////////////////////////////////////
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIterStream; i++)
	{
		r.generate_stream(vec, 4096);// Generate a stream of random numbers
		no_op ^= vec[0];
	}
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("Stream  [4096]      : {:.1f} GB/sec\n", GiB2GB * numIterStream * 4 / duration.count());// Show performance on GB per second

	std::cout << "--------------------------------------------------" << std::endl;

	// Ensures no optimization
	std::cout << std::format("{}", (no_op + no_opd) ? "" : "Bad luck!");
}

void main_hash()
{
	constexpr size_t numIter = 100'000'000;
	uint64_t no_op = 0;// variable to restrict compiler optimizations

	std::cout << "--------------------------------------------------" << std::endl;
	std::cout << "Hashing Performance" << std::endl;
	std::cout << "--------------------------------------------------" << std::endl;

	//////////////////////////////////////////////////////////////////////////////////////
	// uint64_t operation
	//////////////////////////////////////////////////////////////////////////////////////
	wy::hash<uint64_t> hasherUint64;
	auto start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= hasherUint64(i);// Hash
	auto stop = std::chrono::high_resolution_clock::now();
	auto duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("uint64_t         : {:4}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	//////////////////////////////////////////////////////////////////////////////////////
	// String operation
	//////////////////////////////////////////////////////////////////////////////////////
	wy::hash<std::string> hasherStr;
	std::string small("01234567890123");
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= hasherStr(small);// Hash
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("std::string(14)  : {:4}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	small += "01234567890123";
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= hasherStr(small);// Hash
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("std::string(28)  : {:4}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	small += small; small += small;
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= hasherStr(small);// Hash
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("std::string(112) : {:4}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	small += small; small += small;
	start = std::chrono::high_resolution_clock::now();
	for (size_t i = 0; i < numIter; i++) no_op ^= hasherStr(small);// Hash
	stop = std::chrono::high_resolution_clock::now();
	duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
	std::cout << std::format("std::string(448) : {:4}M op/sec\n", numIter / duration.count());// Show performance on millions operations per second

	std::cout << "--------------------------------------------------" << std::endl;

	// Ensures no optimization
	std::cout << std::format("{}", no_op ? "" : "Bad luck!");
}

int main()
{
	main_rand();
	main_hash();

	return 0;
}