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1
16 package net.sf.cglib.reflect;
17
18 import java.lang.reflect.Constructor  ;
19 import java.lang.reflect.Method ;
20 import java.util.*;
21 import junit.framework.*;
22
23 public class TestReflectPerf extends net.sf.cglib.CodeGenTestCase {
24 public interface IndexOf {
25 int indexOf(String s, int start);
26 }
27
28 public void testReflectPerf() throws Throwable {
29 int iterations = 1000000;
30 System.out.println();
31 System.out.println("iteration count: " + iterations);
32
33 String test = "abcabcabc";
34
35 Class [] types = new Class []{ String .class, Integer.TYPE };
36 Method indexOf = String .class.getDeclaredMethod("indexOf", types);
37 FastClass fc = FastClass.create(String .class);
38 FastMethod fm = fc.getMethod("indexOf", types);
39 int fidx = fm.getIndex();
40 Object [] args = new Object []{ "ab", new Integer (1) };
41
42 IndexOf fast = (IndexOf)MethodDelegate.create(test, "indexOf", IndexOf.class);
43
44 int result;
45 long t1 = System.currentTimeMillis();
46 for (int i = 0; i < iterations; i++) {
47 result = ((Integer )fc.invoke("indexOf", types, test, args)).intValue();
48 }
49 long t2 = System.currentTimeMillis();
50 for (int i = 0; i < iterations; i++) {
51 args = new Object []{ "ab", new Integer (1) };
52 result = ((Integer )indexOf.invoke(test, args)).intValue();
53 }
54 long t3 = System.currentTimeMillis();
55 for (int i = 0; i < iterations; i++) {
56 result = ((Integer )indexOf.invoke(test, args)).intValue();
57 }
58 long t4 = System.currentTimeMillis();
59 for (int i = 0; i < iterations; i++) {
60 args = new Object []{ "ab", new Integer (1) };
61 result = ((Integer )fm.invoke(test, args)).intValue();
62 }
63 long t5 = System.currentTimeMillis();
64 for (int i = 0; i < iterations; i++) {
65 result = ((Integer )fm.invoke(test, args)).intValue();
66 }
67 long t6 = System.currentTimeMillis();
68 for (int i = 0; i < iterations; i++) {
69 result = ((Integer )fc.invoke(fidx, test, args)).intValue();
70 }
71 long t7 = System.currentTimeMillis();
72 for (int i = 0; i < iterations; i++) {
73 result = fast.indexOf("ab", 1);
74 }
75 long t8 = System.currentTimeMillis();
76 for (int i = 0; i < iterations; i++) {
77 result = test.indexOf("ab", 1);
78 }
79 long t9 = System.currentTimeMillis();
80
81 System.out.println("fc = " + (t2 - t1)
82 + "\n" + "reflect+args = " + (t3 - t2)
83 + "\n" + "reflect = " + (t4 - t3)
84 + "\n" + "fm+args = " + (t5 - t4)
85 + "\n" + "fm = " + (t6 - t5)
86 + "\n" + "fc w/idx = " + (t7 - t6)
87 + "\n" + "delegate = " + (t8 - t7)
88 + "\n" + "raw = " + (t9 - t8));
89 }
90
91
92
93 public TestReflectPerf(String testName) {
94 super(testName);
95 }
96
97 public static void main(String [] args) {
98 junit.textui.TestRunner.run(suite());
99 }
100
101 public static Test suite() {
102 return new TestSuite(TestReflectPerf.class);
103 }
104
105 public void perform(ClassLoader loader) throws Throwable {
106 }
107
108 public void testFailOnMemoryLeak() throws Throwable {
109 }
110
111 }
112 |
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