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EasyMock provides an easy way to create Mock Objects for interfaces and classes generating them on the fly
/*
* Copyright 2003,2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.easymock.cglib.reflect;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.*;
import junit.framework.*;
public class TestReflectPerf extends org.easymock.cglib.CodeGenTestCase {
public interface IndexOf {
int indexOf(String s, int start);
}
public void testReflectPerf() throws Throwable {
int iterations = 1000000;
System.out.println();
System.out.println("iteration count: " + iterations);
String test = "abcabcabc";
Class[] types = new Class[]{ String.class, Integer.TYPE };
Method indexOf = String.class.getDeclaredMethod("indexOf", types);
FastClass fc = FastClass.create(String.class);
FastMethod fm = fc.getMethod("indexOf", types);
int fidx = fm.getIndex();
Object[] args = new Object[]{ "ab", new Integer(1) };
IndexOf fast = (IndexOf)MethodDelegate.create(test, "indexOf", IndexOf.class);
int result;
long t1 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = ((Integer)fc.invoke("indexOf", types, test, args)).intValue();
}
long t2 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
args = new Object[]{ "ab", new Integer(1) };
result = ((Integer)indexOf.invoke(test, args)).intValue();
}
long t3 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = ((Integer)indexOf.invoke(test, args)).intValue();
}
long t4 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
args = new Object[]{ "ab", new Integer(1) };
result = ((Integer)fm.invoke(test, args)).intValue();
}
long t5 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = ((Integer)fm.invoke(test, args)).intValue();
}
long t6 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = ((Integer)fc.invoke(fidx, test, args)).intValue();
}
long t7 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = fast.indexOf("ab", 1);
}
long t8 = System.currentTimeMillis();
for (int i = 0; i < iterations; i++) {
result = test.indexOf("ab", 1);
}
long t9 = System.currentTimeMillis();
System.out.println("fc = " + (t2 - t1)
+ "\n" + "reflect+args = " + (t3 - t2)
+ "\n" + "reflect = " + (t4 - t3)
+ "\n" + "fm+args = " + (t5 - t4)
+ "\n" + "fm = " + (t6 - t5)
+ "\n" + "fc w/idx = " + (t7 - t6)
+ "\n" + "delegate = " + (t8 - t7)
+ "\n" + "raw = " + (t9 - t8));
}
public TestReflectPerf(String testName) {
super(testName);
}
public static void main(String[] args) {
junit.textui.TestRunner.run(suite());
}
public static Test suite() {
return new TestSuite(TestReflectPerf.class);
}
public void perform(ClassLoader loader) throws Throwable {
}
public void testFailOnMemoryLeak() throws Throwable {
}
}