ExpatPerformanceTest.java revision 1a44d5dcabc18cd5ef111f732ccff91683a1a093 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.sax;
18
19import android.test.AndroidTestCase;
20import android.test.suitebuilder.annotation.LargeTest;
21import android.util.Log;
22import android.util.Xml;
23import org.kxml2.io.KXmlParser;
24import org.xml.sax.SAXException;
25import org.xml.sax.helpers.DefaultHandler;
26import org.xmlpull.v1.XmlPullParser;
27import org.xmlpull.v1.XmlPullParserException;
28
29import java.io.ByteArrayInputStream;
30import java.io.ByteArrayOutputStream;
31import java.io.IOException;
32import java.io.InputStream;
33
34import com.android.frameworks.saxtests.R;
35
36public class ExpatPerformanceTest extends AndroidTestCase {
37
38    private static final String TAG = ExpatPerformanceTest.class.getSimpleName();
39
40    private byte[] mXmlBytes;
41
42    @Override
43    public void setUp() throws Exception {
44        super.setUp();
45        InputStream in = mContext.getResources().openRawResource(R.raw.youtube);
46        ByteArrayOutputStream out = new ByteArrayOutputStream();
47        byte[] buffer = new byte[1024];
48        int length;
49        while ((length = in.read(buffer)) != -1) {
50            out.write(buffer, 0, length);
51        }
52        mXmlBytes = out.toByteArray();
53
54        Log.i("***", "File size: " + (mXmlBytes.length / 1024) + "k");
55    }
56
57    @LargeTest
58    public void testPerformance() throws Exception {
59//        try {
60//            Debug.startMethodTracing("expat3");
61//        for (int i = 0; i < 1; i++) {
62            runJavaPullParser();
63            runSax();
64            runExpatPullParser();
65//        }
66//    } finally {
67//            Debug.stopMethodTracing();
68//        }
69    }
70
71    private InputStream newInputStream() {
72        return new ByteArrayInputStream(mXmlBytes);
73    }
74
75    private void runSax() throws IOException, SAXException {
76        long start = System.currentTimeMillis();
77        Xml.parse(newInputStream(), Xml.Encoding.UTF_8, new DefaultHandler());
78        long elapsed = System.currentTimeMillis() - start;
79        Log.i(TAG, "expat SAX: " + elapsed + "ms");
80    }
81
82    private void runExpatPullParser() throws XmlPullParserException, IOException {
83        long start = System.currentTimeMillis();
84        XmlPullParser pullParser = Xml.newPullParser();
85        pullParser.setInput(newInputStream(), "UTF-8");
86        withPullParser(pullParser);
87        long elapsed = System.currentTimeMillis() - start;
88        Log.i(TAG, "expat pull: " + elapsed + "ms");
89    }
90
91    private void runJavaPullParser() throws XmlPullParserException, IOException {
92        XmlPullParser pullParser;
93        long start = System.currentTimeMillis();
94        pullParser = new KXmlParser();
95        pullParser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
96        pullParser.setInput(newInputStream(), "UTF-8");
97        withPullParser(pullParser);
98        long elapsed = System.currentTimeMillis() - start;
99        Log.i(TAG, "java pull parser: " + elapsed + "ms");
100    }
101
102    private static void withPullParser(XmlPullParser pullParser)
103            throws IOException, XmlPullParserException {
104        int eventType = pullParser.next();
105        while (eventType != XmlPullParser.END_DOCUMENT) {
106            switch (eventType) {
107                case XmlPullParser.START_TAG:
108                    pullParser.getName();
109//                        int nattrs = pullParser.getAttributeCount();
110//                        for (int i = 0; i < nattrs; ++i) {
111//                            pullParser.getAttributeName(i);
112//                            pullParser.getAttributeValue(i);
113//                        }
114                    break;
115                case XmlPullParser.END_TAG:
116                    pullParser.getName();
117                    break;
118                case XmlPullParser.TEXT:
119                    pullParser.getText();
120                    break;
121            }
122            eventType = pullParser.next();
123        }
124    }
125}
126