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
|
/**
* Benchmark of storage mechanisms; array, vector, Qt collections.
*/
#include <QtCore>
#include <vector>
#include "Timer.h"
using namespace std;
#define SL 10000
#define NE 300
template<class T>
class QListSet {
public:
QList<T> l;
void insert(const T &i) {
if (! l.contains(i))
l.append(i);
}
void remove(const T &i) {
l.removeAll(i);
}
};
int main(int argc, char **argv) {
Timer t;
quint64 usins, usiter;
int sum;
{
t.restart();
QSet<int> s;
s.reserve(NE);
for (int i=0;i<NE;i++)
s.insert(i);
usins = t.restart();
sum = 0;
for (int j=0;j<SL;j++)
foreach(int v, s)
sum += v;
usiter = t.restart();
}
qWarning("QSet: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
{
t.restart();
QList<int> s;
for (int i=0;i<NE;i++)
s.append(i);
usins = t.restart();
sum = 0;
for (int j=0;j<SL;j++)
foreach(int v, s)
sum += v;
usiter = t.restart();
}
qWarning("QList: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
{
t.restart();
QVector<int> s;
s.reserve(NE);
for (int i=0;i<NE;i++)
s.append(i);
usins = t.restart();
sum = 0;
for (int j=0;j<SL;j++)
foreach(int v, s)
sum += v;
usiter = t.restart();
}
qWarning("QVector: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
{
t.restart();
vector<int> s;
for (int i=0;i<NE;i++)
s.push_back(i);
usins = t.restart();
sum = 0;
int sz = s.size();
for (int j=0;j<SL;j++)
for (int i=0;i<sz;i++)
sum += s[i];
usiter = t.restart();
}
qWarning("std::vector: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
{
t.restart();
int s[NE];
for (int i=0;i<NE;i++)
s[i]=i;
usins = t.restart();
sum = 0;
for (int j=0;j<SL;j++)
for (int i=0;i<NE;i++)
sum += s[i];
usiter = t.restart();
}
qWarning("c99 alloc: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
{
t.restart();
QListSet<int> s;
for (int i=0;i<NE;i++)
s.insert(i);
usins = t.restart();
sum = 0;
for (int j=0;j<SL;j++)
foreach(int v, s.l)
sum += v;
usiter = t.restart();
}
qWarning("QListSet: %lldus insert, %lldus iterate: %d", usins, usiter, sum);
}
|