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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <unordered_set>
#include <vector>
#include "benchmark/benchmark.h"
#include "ContainerBenchmarks.h"
#include "../GenerateInput.h"
#include "test_macros.h"
using namespace ContainerBenchmarks;
constexpr std::size_t TestNumInputs = 1024;
// The purpose of this hash function is to NOT be implemented as the identity function,
// which is how std::hash is implemented for smaller integral types.
struct NonIdentityScalarHash : std::hash<unsigned long long> {};
// The sole purpose of this comparator is to be used in BM_Rehash, where
// we need something slow enough to be easily noticable in benchmark results.
// The default implementation of operator== for strings seems to be a little
// too fast for that specific benchmark to reliably show a noticeable
// improvement, but unoptimized bytewise comparison fits just right.
// Early return is there just for convenience, since we only compare strings
// of equal length in BM_Rehash.
struct SlowStringEq {
SlowStringEq() = default;
inline TEST_ALWAYS_INLINE bool operator()(const std::string& lhs, const std::string& rhs) const {
if (lhs.size() != rhs.size())
return false;
bool eq = true;
for (size_t i = 0; i < lhs.size(); ++i) {
eq &= lhs[i] == rhs[i];
}
return eq;
}
};
//----------------------------------------------------------------------------//
// BM_InsertValue
// ---------------------------------------------------------------------------//
// Sorted Ascending //
BENCHMARK_CAPTURE(
BM_InsertValue, unordered_set_uint32, std::unordered_set<uint32_t>{}, getRandomIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_InsertValue, unordered_set_uint32_sorted, std::unordered_set<uint32_t>{}, getSortedIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
// Top Bytes //
BENCHMARK_CAPTURE(BM_InsertValue,
unordered_set_top_bits_uint32,
std::unordered_set<uint32_t>{},
getSortedTopBitsIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_InsertValueRehash,
unordered_set_top_bits_uint32,
std::unordered_set<uint32_t, NonIdentityScalarHash>{},
getSortedTopBitsIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
// String //
BENCHMARK_CAPTURE(BM_InsertValue, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_InsertValueRehash, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
// Prefixed String //
BENCHMARK_CAPTURE(
BM_InsertValue, unordered_set_prefixed_string, std::unordered_set<std::string>{}, getPrefixedRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_InsertValueRehash,
unordered_set_prefixed_string,
std::unordered_set<std::string>{},
getPrefixedRandomStringInputs)
->Arg(TestNumInputs);
//----------------------------------------------------------------------------//
// BM_Find
// ---------------------------------------------------------------------------//
// Random //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_random_uint64, std::unordered_set<uint64_t>{}, getRandomIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_random_uint64,
std::unordered_set<uint64_t, NonIdentityScalarHash>{},
getRandomIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
// Sorted //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_sorted_uint64, std::unordered_set<uint64_t>{}, getSortedIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_sorted_uint64,
std::unordered_set<uint64_t, NonIdentityScalarHash>{},
getSortedIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
// Sorted //
#ifndef TEST_HAS_NO_INT128
BENCHMARK_CAPTURE(BM_Find,
unordered_set_sorted_uint128,
std::unordered_set<__uint128_t>{},
getSortedTopBitsIntegerInputs<__uint128_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_sorted_uint128,
std::unordered_set<__uint128_t>{},
getSortedTopBitsIntegerInputs<__uint128_t>)
->Arg(TestNumInputs);
#endif
// Sorted //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_sorted_uint32, std::unordered_set<uint32_t>{}, getSortedIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_sorted_uint32,
std::unordered_set<uint32_t, NonIdentityScalarHash>{},
getSortedIntegerInputs<uint32_t>)
->Arg(TestNumInputs);
// Sorted Ascending //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_sorted_large_uint64, std::unordered_set<uint64_t>{}, getSortedLargeIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_sorted_large_uint64,
std::unordered_set<uint64_t, NonIdentityScalarHash>{},
getSortedLargeIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
// Top Bits //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_top_bits_uint64, std::unordered_set<uint64_t>{}, getSortedTopBitsIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash,
unordered_set_top_bits_uint64,
std::unordered_set<uint64_t, NonIdentityScalarHash>{},
getSortedTopBitsIntegerInputs<uint64_t>)
->Arg(TestNumInputs);
// String //
BENCHMARK_CAPTURE(BM_Find, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_FindRehash, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
// Prefixed String //
BENCHMARK_CAPTURE(
BM_Find, unordered_set_prefixed_string, std::unordered_set<std::string>{}, getPrefixedRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_FindRehash, unordered_set_prefixed_string, std::unordered_set<std::string>{}, getPrefixedRandomStringInputs)
->Arg(TestNumInputs);
//----------------------------------------------------------------------------//
// BM_Rehash
// ---------------------------------------------------------------------------//
BENCHMARK_CAPTURE(BM_Rehash,
unordered_set_string_arg,
std::unordered_set<std::string, std::hash<std::string>, SlowStringEq>{},
getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_Rehash, unordered_set_int_arg, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
//----------------------------------------------------------------------------//
// BM_Compare
// ---------------------------------------------------------------------------//
BENCHMARK_CAPTURE(
BM_Compare_same_container, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_Compare_same_container, unordered_set_int, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_Compare_different_containers, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_Compare_different_containers, unordered_set_int, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
///////////////////////////////////////////////////////////////////////////////
BENCHMARK_CAPTURE(BM_InsertDuplicate, unordered_set_int, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_InsertDuplicate, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_EmplaceDuplicate, unordered_set_int, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_EmplaceDuplicate, unordered_set_string, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_InsertDuplicate, unordered_set_int_insert_arg, std::unordered_set<int>{}, getRandomIntegerInputs<int>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_InsertDuplicate, unordered_set_string_insert_arg, std::unordered_set<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_EmplaceDuplicate, unordered_set_int_insert_arg, std::unordered_set<int>{}, getRandomIntegerInputs<unsigned>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(
BM_EmplaceDuplicate, unordered_set_string_arg, std::unordered_set<std::string>{}, getRandomCStringInputs)
->Arg(TestNumInputs);
BENCHMARK_MAIN();
|
