1 /* 2 * Copyright (C) 2011 Google Inc. 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 17 package benchmarks.regression; 18 19 import com.google.caliper.Param; 20 import com.google.caliper.SimpleBenchmark; 21 import java.io.StringReader; 22 import javax.xml.parsers.DocumentBuilder; 23 import javax.xml.parsers.DocumentBuilderFactory; 24 import org.xml.sax.InputSource; 25 import org.xmlpull.v1.XmlPullParser; 26 import org.xmlpull.v1.XmlPullParserFactory; 27 28 // http://code.google.com/p/android/issues/detail?id=18102 29 public final class XmlEntitiesBenchmark extends SimpleBenchmark { 30 31 @Param({"10", "100", "1000"}) int length; 32 @Param({"0", "0.5", "1.0"}) float entityFraction; 33 34 private XmlPullParserFactory xmlPullParserFactory; 35 private DocumentBuilderFactory documentBuilderFactory; 36 37 /** a string like {@code <doc>&&++</doc>}. */ 38 private String xml; 39 setUp()40 @Override protected void setUp() throws Exception { 41 xmlPullParserFactory = XmlPullParserFactory.newInstance(); 42 documentBuilderFactory = DocumentBuilderFactory.newInstance(); 43 44 StringBuilder xmlBuilder = new StringBuilder(); 45 xmlBuilder.append("<doc>"); 46 for (int i = 0; i < (length * entityFraction); i++) { 47 xmlBuilder.append("&"); 48 } 49 while (xmlBuilder.length() < length) { 50 xmlBuilder.append("+"); 51 } 52 xmlBuilder.append("</doc>"); 53 xml = xmlBuilder.toString(); 54 } 55 timeXmlParser(int reps)56 public void timeXmlParser(int reps) throws Exception { 57 for (int i = 0; i < reps; i++) { 58 XmlPullParser parser = xmlPullParserFactory.newPullParser(); 59 parser.setInput(new StringReader(xml)); 60 while (parser.next() != XmlPullParser.END_DOCUMENT) { 61 } 62 } 63 } 64 timeDocumentBuilder(int reps)65 public void timeDocumentBuilder(int reps) throws Exception { 66 for (int i = 0; i < reps; i++) { 67 DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder(); 68 documentBuilder.parse(new InputSource(new StringReader(xml))); 69 } 70 } 71 } 72