Source Code Cross Referenced for PerformanceTestCase.java in  » Parser » chaperon-3.0 » net » sourceforge » chaperon » test » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Parser » chaperon 3.0 » net.sourceforge.chaperon.test 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Copyright (C) Chaperon. All rights reserved.
003:         *  -------------------------------------------------------------------------
004:         *  This software is published under the terms of the Apache Software License
005:         *  version 1.1, a copy of which has been included  with this distribution in
006:         *  the LICENSE file.
007:         */
008:
009:        package net.sourceforge.chaperon.test;
010:
011:        import junit.framework.Test;
012:        import junit.framework.TestCase;
013:        import junit.framework.TestSuite;
014:
015:        public class PerformanceTestCase extends TestCase {
016:            private int max1 = 5000;
017:            private int max2 = 500000;
018:
019:            public PerformanceTestCase(String name) {
020:                super (name);
021:            }
022:
023:            public void testFixedArray() throws Exception {
024:                System.out
025:                        .println("------------------------------------ testFixedArray");
026:                runGC();
027:
028:                long time = System.currentTimeMillis();
029:                long memory = usedMemory();
030:
031:                Container[] array = new Container[0];
032:                for (int i = 0; i < max1; i++) {
033:                    Container[] newArray = new Container[array.length + 1];
034:                    System.arraycopy(array, 0, newArray, 0, array.length);
035:                    newArray[array.length] = new Container(i);
036:                    array = newArray;
037:                }
038:
039:                System.out.println("time = "
040:                        + (System.currentTimeMillis() - time) + " ms");
041:                System.out.println("memory = " + (usedMemory() - memory)
042:                        + " bytes");
043:
044:                runGC();
045:
046:                time = System.currentTimeMillis();
047:
048:                long sum = 0;
049:                for (int i = 0; i < array.length; i++)
050:                    sum += array[i].value;
051:
052:                System.out.println("time = "
053:                        + (System.currentTimeMillis() - time) + " ms");
054:            }
055:
056:            public void testArray() throws Exception {
057:                System.out
058:                        .println("------------------------------------ testArray");
059:                runGC();
060:
061:                long time = System.currentTimeMillis();
062:                long memory = usedMemory();
063:
064:                Container[] array = new Container[10];
065:                int count = 0;
066:                for (int i = 0; i < max1; i++) {
067:                    if (array.length == (count + 1)) {
068:                        Container[] newArray = new Container[array.length + 10];
069:                        System.arraycopy(array, 0, newArray, 0, array.length);
070:                        newArray[array.length] = new Container(i);
071:                        array = newArray;
072:                    }
073:
074:                    array[count++] = new Container(i);
075:                }
076:
077:                System.out.println("time = "
078:                        + (System.currentTimeMillis() - time) + " ms");
079:                System.out.println("memory = " + (usedMemory() - memory)
080:                        + " bytes");
081:
082:                runGC();
083:
084:                time = System.currentTimeMillis();
085:
086:                long sum = 0;
087:                for (int i = 0; i < count; i++)
088:                    sum += array[i].value;
089:
090:                System.out.println("time = "
091:                        + (System.currentTimeMillis() - time) + " ms");
092:            }
093:
094:            public void testList() throws Exception {
095:                System.out
096:                        .println("------------------------------------ testList");
097:                runGC();
098:
099:                long time = System.currentTimeMillis();
100:                long memory = usedMemory();
101:
102:                Container head = null;
103:                for (int i = 0; i < max1; i++)
104:                    head = new Container(i, head);
105:
106:                System.out.println("time = "
107:                        + (System.currentTimeMillis() - time) + " ms");
108:                System.out.println("memory = " + (usedMemory() - memory)
109:                        + " bytes");
110:
111:                runGC();
112:
113:                time = System.currentTimeMillis();
114:
115:                long sum = 0;
116:                for (Container c = head; c != null; c = c.previous)
117:                    sum += c.value;
118:
119:                System.out.println("time = "
120:                        + (System.currentTimeMillis() - time) + " ms");
121:            }
122:
123:            public class Container {
124:                public Container previous;
125:                public int value;
126:
127:                public Container(int value) {
128:                    this .value = value;
129:                }
130:
131:                public Container(int value, Container previous) {
132:                    this .value = value;
133:                    this .previous = previous;
134:                }
135:
136:                public void setPrevious(Container previous) {
137:                    this .previous = previous;
138:                }
139:
140:                public Container getPrevious() {
141:                    return previous;
142:                }
143:
144:                public void setValue(int value) {
145:                    this .value = value;
146:                }
147:
148:                public int getValue() {
149:                    return value;
150:                }
151:
152:                public String toString() {
153:                    return String.valueOf(value);
154:                }
155:            }
156:
157:            public void testInheritConatiner() throws Exception {
158:                System.out
159:                        .println("------------------------------------ testInheritConatiner");
160:
161:                NumContainer head = null;
162:                for (int i = 0; i < max2; i++) {
163:                    long value = (int) (Math.random() * 100.0);
164:                    if (value > 50)
165:                        head = new LongContainer(value, head);
166:                    else
167:                        head = new IntContainer((int) value, head);
168:                }
169:
170:                runGC();
171:
172:                long time = System.currentTimeMillis();
173:                long memory = usedMemory();
174:
175:                long sum = 0;
176:                for (NumContainer c = head; c != null; c = c.next) {
177:                    if (c instanceof  IntContainer)
178:                        sum += ((IntContainer) c).value;
179:                    else
180:                        sum += ((LongContainer) c).value;
181:                }
182:
183:                System.out.println("time = "
184:                        + (System.currentTimeMillis() - time) + " ms");
185:                System.out.println("memory = " + (usedMemory() - memory)
186:                        + " bytes");
187:            }
188:
189:            public void testMixedConatiner() throws Exception {
190:                System.out
191:                        .println("------------------------------------ testMixedConatiner");
192:
193:                MixedContainer head = null;
194:                for (int i = 0; i < max2; i++) {
195:                    long value = (int) (Math.random() * 100.0);
196:                    if (value > 50)
197:                        head = new MixedContainer(value, head);
198:                    else
199:                        head = new MixedContainer((int) value, head);
200:                }
201:
202:                runGC();
203:
204:                long time = System.currentTimeMillis();
205:                long memory = usedMemory();
206:
207:                long sum = 0;
208:                for (MixedContainer c = head; c != null; c = c.next) {
209:                    if (c.isLong)
210:                        sum += c.longValue;
211:                    else
212:                        sum += c.intValue;
213:                }
214:
215:                System.out.println("time = "
216:                        + (System.currentTimeMillis() - time) + " ms");
217:                System.out.println("memory = " + (usedMemory() - memory)
218:                        + " bytes");
219:            }
220:
221:            public void testBlind() throws Exception {
222:                System.out
223:                        .println("------------------------------------ testBlind");
224:                runGC();
225:
226:                long time = System.currentTimeMillis();
227:                long memory = usedMemory();
228:
229:                long sum = 0;
230:                for (int i = 0; i < max2; i++)
231:                    sum += i;
232:
233:                System.out.println("time = "
234:                        + (System.currentTimeMillis() - time) + " ms");
235:                System.out.println("memory = " + (usedMemory() - memory)
236:                        + " bytes");
237:            }
238:
239:            public abstract class NumContainer {
240:                public NumContainer next;
241:            }
242:
243:            public class LongContainer extends NumContainer {
244:                public long value;
245:
246:                public LongContainer(long value, NumContainer next) {
247:                    this .value = value;
248:                    this .next = next;
249:                }
250:            }
251:
252:            public class IntContainer extends NumContainer {
253:                public int value;
254:
255:                public IntContainer(int value, NumContainer next) {
256:                    this .value = value;
257:                    this .next = next;
258:                }
259:            }
260:
261:            public class MixedContainer {
262:                public MixedContainer next;
263:                public boolean isLong;
264:                public long longValue;
265:                public int intValue;
266:
267:                public MixedContainer(long value, MixedContainer next) {
268:                    isLong = true;
269:                    this .longValue = value;
270:                    this .next = next;
271:                }
272:
273:                public MixedContainer(int value, MixedContainer next) {
274:                    isLong = false;
275:                    this .intValue = value;
276:                    this .next = next;
277:                }
278:            }
279:
280:            private static void runGC() throws Exception {
281:                // It helps to call Runtime.gc()
282:                // using several method calls:
283:                for (int r = 0; r < 4; ++r)
284:                    _runGC();
285:            }
286:
287:            private static void _runGC() throws Exception {
288:                long usedMem1 = usedMemory();
289:                long usedMem2 = Long.MAX_VALUE;
290:                for (int i = 0; (usedMem1 < usedMem2) && (i < 500); ++i) {
291:                    s_runtime.runFinalization();
292:                    s_runtime.gc();
293:                    Thread.yield();
294:
295:                    usedMem2 = usedMem1;
296:                    usedMem1 = usedMemory();
297:                }
298:            }
299:
300:            private static long usedMemory() {
301:                return s_runtime.totalMemory() - s_runtime.freeMemory();
302:            }
303:
304:            private static final Runtime s_runtime = Runtime.getRuntime();
305:
306:            public static Test suite() {
307:                return new TestSuite(PerformanceTestCase.class);
308:            }
309:        }
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