/sax/tests/saxtests/src/android/sax/ExpatPerformanceTest.java

  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}