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Java > Open Source Codes > nu > xom > benchmarks > DOMConverterBench


1 /* Copyright 2004 Elliotte Rusty Harold
2    
3    This library is free software; you can redistribute it and/or modify
4    it under the terms of version 2.1 of the GNU Lesser General Public
5    License as published by the Free Software Foundation.
6    
7    This library is distributed in the hope that it will be useful,
8    but WITHOUT ANY WARRANTY; without even the implied warranty of
9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10    GNU Lesser General Public License for more details.
11    
12    You should have received a copy of the GNU Lesser General Public
13    License along with this library; if not, write to the
14    Free Software Foundation, Inc., 59 Temple Place, Suite 330,
15    Boston, MA 02111-1307 USA
16    
17    You can contact Elliotte Rusty Harold by sending e-mail to
18    elharo@metalab.unc.edu. Please include the word "XOM" in the
19    subject line. The XOM home page is located at http://www.xom.nu/
20 */
21
22 package nu.xom.benchmarks;
23
24 import javax.xml.parsers.DocumentBuilder JavaDoc;
25 import javax.xml.parsers.DocumentBuilderFactory JavaDoc;
26
27 import org.w3c.dom.DOMImplementation JavaDoc;
28
29 import nu.xom.Builder;
30 import nu.xom.Document;
31 import nu.xom.Element;
32 import nu.xom.converters.DOMConverter;
33
34 /**
35  * <p>
36  * Benchmark the performance of DOMConverter on a large, record-like
37  * document. For convenience the document is formed by copying one
38  * record 30,000 times. Running this benchmark normally requires
39  * increasing Java's default heap size.
40  * </p>
41  *
42  * @author Elliotte Rusty Harold
43  * @version 1.0
44  *
45  */
46 class DOMConverterBench {
47
48     private static String JavaDoc elementData = "<zazy>\n"
49         + "<or>476w4l73</or>\n"
50         + "<kfjjiz>6729</kfjjiz>\n"
51         + "<yzsyk>N-Vgj / Yvv Zjysbeu Wwvmk @Yhwc 3=</yzsyk>\n"
52         + "<xibwh>gmaj/zhffyi</xibwh>\n"
53         + "<okq> RUWU: 7124 GR0Z: 20</okq>\n"
54         + "<fmido phpub='3' upfylj='520'>Njm Qmskwo</fmido>\n"
55         + "<fmido phpub='4' upfylj='58312'>Tgnnja Fvwlc</fmido>\n"
56         + "<fmido phpub='4' upfylj='53300'>Iii Pbou Ia Yniugiq</fmido>\n"
57         + "<fmido phpub='5' upfylj='07978'>Vzbpqhud Fm Ptwv</fmido>\n"
58         + "<fmido phpub='6' upfylj='86987'>Fu Ffe Uxvkf</fmido>\n"
59         + "<fmido phpub='6' upfylj='15968'>Kw Biv Bh Ngu Rpaw</fmido>\n"
60         + "<fmido phpub='5' upfylj='94511'>Pnzm Vj Qav Tapnie</fmido>\n"
61         + "<fmido phpub='9' upfylj='90284'>Pawqj Dkqxaslb</fmido>\n"
62         + "<fmido phpub='9' upfylj='44613'>Hsb Aotlml Faa Vpbotugw</fmido>\n"
63         + "<fmido phpub='01' upfylj='369255'>Wvex Wwlrr'o Rnbklfz</fmido>\n"
64         + "<fmido phpub='45' upfylj='787725'>Sdu Edrbo</fmido>\n"
65         + "<fmido phpub='52' upfylj='201908'>Urvr Ot Udbq</fmido>\n"
66         + "<fmido phpub='07' upfylj='025982'>Prgovq Mrm</fmido>\n"
67         + "<fmido phpub='34' upfylj='297465'>Nxr'l Zgoh Zvtl</fmido>\n"
68         + "<fmido phpub='97' upfylj='389353'>Vkcixopj Ccdo</fmido>\n"
69         + "<fmido phpub='51' upfylj='212507'>Dlx'h Rclq Mtxiba Gim</fmido>\n"
70         + "<fmido phpub='36' upfylj='214427'>Bepj Hbrvmgp</fmido>\n"
71         + "<fmido phpub='08' upfylj='523903'>Khxh Anpl</fmido>\n"
72         + "</zazy>\n";
73     
74     
75     public static void main(String JavaDoc[] args) throws Exception JavaDoc {
76         
77         Runtime JavaDoc r = Runtime.getRuntime();
78         long memory = r.totalMemory() - r.freeMemory();
79         
80         System.out.println("Initial: " + memory);
81         
82         Builder JavaDoc builder = new Builder JavaDoc();
83         Document dataDoc = builder.build(elementData, "http://www.example.com");
84         Element root = new Element("root");
85         Document doc = new Document(root);
86         Element dataElement = dataDoc.getRootElement();
87
88         
89         for (int i = 0; i < 30000; i++) {
90             root.appendChild(dataElement.copy());
91         }
92         
93         System.out.println("Built document: "
94           + (r.totalMemory() - r.freeMemory())/(1024.0*1024) + "MB");
95         System.gc(); System.gc(); System.gc();
96         System.out.println("After garbage collection: "
97           + (r.totalMemory() - r.freeMemory())/(1024.0*1024) + "MB");
98         DocumentBuilderFactory JavaDoc factory = DocumentBuilderFactory.newInstance();
99         factory.setNamespaceAware(true);
100         DocumentBuilder JavaDoc jaxp = factory.newDocumentBuilder();
101         DOMImplementation JavaDoc impl = jaxp.getDOMImplementation();
102                 
103         System.gc(); System.gc(); System.gc();
104         // Warm up HotSpot
105 DOMConverter.convert(doc, impl);
106         DOMConverter.convert(doc, impl);
107         DOMConverter.convert(doc, impl);
108         System.out.println("Warmed up: "
109           + ((r.totalMemory() - r.freeMemory())/(1024.0*1024)) + "MB");
110         System.gc(); System.gc(); System.gc();
111         // System.out.println("Turn on profiling and hit return");
112 // System.in.read();
113
114         // time
115 long pre = System.currentTimeMillis();
116         DOMConverter.convert(doc, impl);
117         long post = System.currentTimeMillis();
118         System.out.println((post - pre)/1000.0 + "s to convert document");
119         
120     }
121     
122 }
123
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