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1
8
9 package net.sourceforge.chaperon.test;
10
11 import junit.framework.Test;
12 import junit.framework.TestCase;
13 import junit.framework.TestSuite;
14
15 public class PerformanceTestCase extends TestCase
16 {
17 private int max1 = 5000;
18 private int max2 = 500000;
19
20 public PerformanceTestCase(String  name)
21 {
22 super(name);
23 }
24
25 public void testFixedArray() throws Exception
26 {
27 System.out.println("------------------------------------ testFixedArray");
28 runGC();
29
30 long time = System.currentTimeMillis();
31 long memory = usedMemory();
32
33 Container[] array = new Container[0];
34 for (int i = 0; i<max1; i++)
35 {
36 Container[] newArray = new Container[array.length+1];
37 System.arraycopy(array, 0, newArray, 0, array.length);
38 newArray[array.length] = new Container(i);
39 array = newArray;
40 }
41
42 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
43 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
44
45 runGC();
46
47 time = System.currentTimeMillis();
48
49 long sum = 0;
50 for (int i = 0; i<array.length; i++)
51 sum += array[i].value;
52
53 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
54 }
55
56 public void testArray() throws Exception
57 {
58 System.out.println("------------------------------------ testArray");
59 runGC();
60
61 long time = System.currentTimeMillis();
62 long memory = usedMemory();
63
64 Container[] array = new Container[10];
65 int count = 0;
66 for (int i = 0; i<max1; i++)
67 {
68 if (array.length==(count+1))
69 {
70 Container[] newArray = new Container[array.length+10];
71 System.arraycopy(array, 0, newArray, 0, array.length);
72 newArray[array.length] = new Container(i);
73 array = newArray;
74 }
75
76 array[count++] = new Container(i);
77 }
78
79 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
80 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
81
82 runGC();
83
84 time = System.currentTimeMillis();
85
86 long sum = 0;
87 for (int i = 0; i<count; i++)
88 sum += array[i].value;
89
90 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
91 }
92
93 public void testList() throws Exception
94 {
95 System.out.println("------------------------------------ testList");
96 runGC();
97
98 long time = System.currentTimeMillis();
99 long memory = usedMemory();
100
101 Container head = null;
102 for (int i = 0; i<max1; i++)
103 head = new Container(i, head);
104
105 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
106 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
107
108 runGC();
109
110 time = System.currentTimeMillis();
111
112 long sum = 0;
113 for (Container c = head; c!=null; c = c.previous)
114 sum += c.value;
115
116 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
117 }
118
119 public class Container
120 {
121 public Container previous;
122 public int value;
123
124 public Container(int value)
125 {
126 this.value = value;
127 }
128
129 public Container(int value, Container previous)
130 {
131 this.value = value;
132 this.previous = previous;
133 }
134
135 public void setPrevious(Container previous)
136 {
137 this.previous = previous;
138 }
139
140 public Container getPrevious()
141 {
142 return previous;
143 }
144
145 public void setValue(int value)
146 {
147 this.value = value;
148 }
149
150 public int getValue()
151 {
152 return value;
153 }
154
155 public String toString()
156 {
157 return String.valueOf(value);
158 }
159 }
160
161 public void testInheritConatiner() throws Exception
162 {
163 System.out.println("------------------------------------ testInheritConatiner");
164
165 NumContainer head = null;
166 for (int i = 0; i<max2; i++)
167 {
168 long value = (int)(Math.random()*100.0);
169 if (value>50)
170 head = new LongContainer(value, head);
171 else
172 head = new IntContainer((int)value, head);
173 }
174
175 runGC();
176
177 long time = System.currentTimeMillis();
178 long memory = usedMemory();
179
180 long sum = 0;
181 for (NumContainer c = head; c!=null; c = c.next)
182 {
183 if (c instanceof IntContainer)
184 sum += ((IntContainer)c).value;
185 else
186 sum += ((LongContainer)c).value;
187 }
188
189 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
190 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
191 }
192
193 public void testMixedConatiner() throws Exception
194 {
195 System.out.println("------------------------------------ testMixedConatiner");
196
197 MixedContainer head = null;
198 for (int i = 0; i<max2; i++)
199 {
200 long value = (int)(Math.random()*100.0);
201 if (value>50)
202 head = new MixedContainer(value, head);
203 else
204 head = new MixedContainer((int)value, head);
205 }
206
207 runGC();
208
209 long time = System.currentTimeMillis();
210 long memory = usedMemory();
211
212 long sum = 0;
213 for (MixedContainer c = head; c!=null; c = c.next)
214 {
215 if (c.isLong)
216 sum += c.longValue;
217 else
218 sum += c.intValue;
219 }
220
221 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
222 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
223 }
224
225 public void testBlind() throws Exception
226 {
227 System.out.println("------------------------------------ testBlind");
228 runGC();
229
230 long time = System.currentTimeMillis();
231 long memory = usedMemory();
232
233 long sum = 0;
234 for (int i = 0; i<max2; i++)
235 sum += i;
236
237 System.out.println("time = "+(System.currentTimeMillis()-time)+" ms");
238 System.out.println("memory = "+(usedMemory()-memory)+" bytes");
239 }
240
241 public abstract class NumContainer
242 {
243 public NumContainer next;
244 }
245
246 public class LongContainer extends NumContainer
247 {
248 public long value;
249
250 public LongContainer(long value, NumContainer next)
251 {
252 this.value = value;
253 this.next = next;
254 }
255 }
256
257 public class IntContainer extends NumContainer
258 {
259 public int value;
260
261 public IntContainer(int value, NumContainer next)
262 {
263 this.value = value;
264 this.next = next;
265 }
266 }
267
268 public class MixedContainer
269 {
270 public MixedContainer next;
271 public boolean isLong;
272 public long longValue;
273 public int intValue;
274
275 public MixedContainer(long value, MixedContainer next)
276 {
277 isLong = true;
278 this.longValue = value;
279 this.next = next;
280 }
281
282 public MixedContainer(int value, MixedContainer next)
283 {
284 isLong = false;
285 this.intValue = value;
286 this.next = next;
287 }
288 }
289
290 private static void runGC() throws Exception
291 {
292 for (int r = 0; r<4; ++r)
295 _runGC();
296 }
297
298 private static void _runGC() throws Exception
299 {
300 long usedMem1 = usedMemory();
301 long usedMem2 = Long.MAX_VALUE;
302 for (int i = 0; (usedMem1<usedMem2) && (i<500); ++i)
303 {
304 s_runtime.runFinalization();
305 s_runtime.gc();
306 Thread.yield();
307
308 usedMem2 = usedMem1;
309 usedMem1 = usedMemory();
310 }
311 }
312
313 private static long usedMemory()
314 {
315 return s_runtime.totalMemory()-s_runtime.freeMemory();
316 }
317
318 private static final Runtime s_runtime = Runtime.getRuntime();
319
320 public static Test suite()
321 {
322 return new TestSuite(PerformanceTestCase.class);
323 }
324 }
325 |
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