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1
9 package javolution;
10
11 import javolution.lang.MathLib;
12 import javolution.lang.Text;
13 import javolution.realtime.PoolContext;
14
15
21 final class Perf_Lang extends Javolution implements Runnable {
22
23 private static final int COUNT = 1000;
24
25 private final String STRING = "Concatenates this line 1000 times (resulting in a text of about 80,000 characters)";
26
27 private final Text TEXT = Text.valueOf(STRING);
28
29 private final Text ONE_CHAR = Text.valueOf('X');
30
31
34 public void run() {
35 println("//////////////////////////////");
36 println("// Package: javolution.lang //");
37 println("//////////////////////////////");
38 println("");
39
40 println("-- String/StringBuffer versus Text --");
41 println("");
42
43 println("\"" + STRING + "\"");
44
45 print("String \"+\" operator: ");
46 startTime();
47 String str = "";
48 for (int j = 0; j < COUNT; j++) {
49 str += STRING;
50 }
51 println(endTime(1));
52
53 print("StringBuffer \"append\" : ");
54 startTime();
55 for (int i = 0; i < 100; i++) {
56 StringBuffer sb = new StringBuffer();
57 for (int j = 0; j < COUNT; j++) {
58 sb.append(STRING);
59 }
60 }
61 println(endTime(100));
62
63 print("Text \"concat\" (heap): ");
64 startTime();
65 for (int i = 0; i < 100; i++) {
66 Text txt = Text.EMPTY;
67 for (int j = 0; j < COUNT; j++) {
68 txt = txt.concat(TEXT);
69 }
70 }
71 println(endTime(100));
72
73 print("Text \"concat\" (stack): ");
74 startTime();
75 for (int i = 0; i < 100; i++) {
76 PoolContext.enter();
77 Text txt = Text.EMPTY;
78 for (int j = 0; j < COUNT; j++) {
79 txt = txt.concat(TEXT);
80 }
81 PoolContext.exit();
82 }
83 println(endTime(100));
84
85 println("");
86 println("Inserts one character at random locations 1,000 times to the 80,000 characters text.");
87
88 print("StringBuffer insert: ");
89 startTime();
90 for (int i = 0; i < 100; i++) {
91 StringBuffer sb = new StringBuffer(str);
92 for (int j = 1; j < COUNT; j++) {
93 int index = MathLib.randomInt(0, sb.length());
94 sb.insert(index, 'X');
95 }
96 }
97 println(endTime(100));
98
99 print("Text insert (heap): ");
100 startTime();
101 for (int i = 0; i < 100; i++) {
102 Text txt = Text.valueOf(str);
103 for (int j = 1; j < COUNT; j++) {
104 int index = MathLib.randomInt(0, txt.length());
105 txt = txt.insert(index, ONE_CHAR);
106 }
107 }
108 println(endTime(100));
109
110 print("Text insert (stack): ");
111 startTime();
112 for (int i = 0; i < 100; i++) {
113 PoolContext.enter();
114 Text txt = Text.valueOf(str);
115 for (int j = 1; j < COUNT; j++) {
116 int index = MathLib.randomInt(0, txt.length());
117 txt = txt.insert(index, ONE_CHAR);
118 }
119 PoolContext.exit();
120 }
121 println(endTime(100));
122
123 println("");
124 println("Delete 1,000 times one character at random location from the 80,000 characters text.");
125
126 StringBuffer tmp = new StringBuffer();
127 print("StringBuffer delete: ");
128 startTime();
129 for (int i = 0; i < 100; i++) {
130 StringBuffer sb = new StringBuffer(str);
131 for (int j = 0; j < COUNT; j++) {
132 int index = MathLib.randomInt(0, sb.length() - 1);
133 sb.deleteCharAt(index);
134 }
135 }
136 println(endTime(100));
137
138 print("Text delete (heap): ");
139 startTime();
140 for (int i = 0; i < 100; i++) {
141 Text txt = Text.valueOf(str);
142 for (int j = 0; j < COUNT; j++) {
143 int index = MathLib.randomInt(0, txt.length() - 1);
144 txt = txt.delete(index, index + 1);
145 }
146 }
147 println(endTime(100));
148
149 print("Text delete (stack): ");
150 startTime();
151 for (int i = 0; i < 100; i++) {
152 PoolContext.enter();
153 Text txt = Text.valueOf(str);
154 for (int j = 0; j < COUNT; j++) {
155 int index = MathLib.randomInt(0, txt.length() - 1);
156 txt = txt.delete(index, index + 1);
157 }
158 PoolContext.exit();
159 }
160 println(endTime(100));
161
162 println("");
163 }
164 } |
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