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
|
// Copyright (C) 2016 The Qt Company Ltd.
// Copyright (C) 2016 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "tst_bench_qhash.h"
#include <QFile>
#include <QHash>
#include <QString>
#include <QStringList>
#include <QUuid>
#include <QTest>
class tst_QHash : public QObject
{
Q_OBJECT
private slots:
void initTestCase();
void qhash_current_data() { data(); }
void qhash_current() { qhash_template<QString>(); }
void qhash_qt50_data() { data(); }
void qhash_qt50() { qhash_template<Qt50String>(); }
void qhash_qt4_data() { data(); }
void qhash_qt4() { qhash_template<Qt4String>(); }
void qhash_javaString_data() { data(); }
void qhash_javaString() { qhash_template<JavaString>(); }
void hashing_current_data() { data(); }
void hashing_current() { hashing_template<QString>(); }
void hashing_qt50_data() { data(); }
void hashing_qt50() { hashing_template<Qt50String>(); }
void hashing_qt4_data() { data(); }
void hashing_qt4() { hashing_template<Qt4String>(); }
void hashing_javaString_data() { data(); }
void hashing_javaString() { hashing_template<JavaString>(); }
private:
void data();
template <typename String> void qhash_template();
template <typename String> void hashing_template();
QStringList smallFilePaths;
QStringList uuids;
QStringList dict;
QStringList numbers;
};
///////////////////// QHash /////////////////////
#include <QDebug>
void tst_QHash::initTestCase()
{
// small list of strings (that happen to look like file paths produced long
// ago by cd ../.. && find . -print, but that's irrelevant).
QFile smallPathsData(QFINDTESTDATA("paths_small_data.txt"));
QVERIFY(smallPathsData.open(QIODevice::ReadOnly));
smallFilePaths = QString::fromLatin1(smallPathsData.readAll()).split(QLatin1Char('\n'));
QVERIFY(!smallFilePaths.isEmpty());
// list of UUIDs
// guaranteed to be completely random, generated by http://xkcd.com/221/
QUuid ns = QUuid("{f43d2ef3-2fe9-4563-a6f5-5a0100c2d699}");
uuids.reserve(smallFilePaths.size());
foreach (const QString &path, smallFilePaths)
uuids.append(QUuid::createUuidV5(ns, path).toString());
// lots of strings with alphabetical characters, vaguely reminiscent of
// a dictionary.
//
// this programatically generates a series like:
// AAAAAA
// AAAAAB
// AAAAAC
// ...
// AAAAAZ
// AAAABZ
// ...
// AAAAZZ
// AAABZZ
QByteArray id("AAAAAAA");
if (dict.isEmpty()) {
for (int i = id.length() - 1; i > 0;) {
dict.append(id);
char c = id.at(i);
id[i] = ++c;
if (c == 'Z') {
// wrap to next digit
i--;
id[i] = 'A';
}
}
}
// string versions of numbers.
for (int i = 5000000; i < 5005001; ++i)
numbers.append(QString::number(i));
}
void tst_QHash::data()
{
QTest::addColumn<QStringList>("items");
QTest::newRow("paths-small") << smallFilePaths;
QTest::newRow("uuids-list") << uuids;
QTest::newRow("dictionary") << dict;
QTest::newRow("numbers") << numbers;
}
template <typename String> void tst_QHash::qhash_template()
{
QFETCH(QStringList, items);
QHash<String, int> hash;
QList<String> realitems;
foreach (const QString &s, items)
realitems.append(s);
QBENCHMARK {
for (int i = 0, n = realitems.size(); i != n; ++i) {
hash[realitems.at(i)] = i;
}
}
}
template <typename String> void tst_QHash::hashing_template()
{
// just the hashing function
QFETCH(QStringList, items);
QList<String> realitems;
realitems.reserve(items.size());
foreach (const QString &s, items)
realitems.append(s);
QBENCHMARK {
for (int i = 0, n = realitems.size(); i != n; ++i)
(void)qHash(realitems.at(i));
}
}
QTEST_MAIN(tst_QHash)
#include "tst_bench_qhash.moc"
|
