bundles/org.simantics.databoard/scratch/org/simantics/databoard/tests/StringUTFTest.java

   1 package org.simantics.databoard.tests;\r
   2 \r
   3 import java.io.ByteArrayInputStream;\r
   4 import java.io.ByteArrayOutputStream;\r
   5 import java.io.DataInputStream;\r
   6 import java.io.DataOutputStream;\r
   7 import java.nio.charset.Charset;\r
   8 \r
   9 import org.simantics.databoard.Bindings;\r
  10 import org.simantics.databoard.binding.StringBinding;\r
  11 \r
  12 /**\r
  13  *\r
  14  * @author Toni Kalajainen <toni.kalajainen@iki.fi>\r
  15  */\r
  16 public class StringUTFTest {\r
  17         \r
  18         public static void main(String[] args) throws Exception {\r
  19                 \r
  20                 StringBinding b = Bindings.STRING;\r
  21                 int c = 10000;\r
  22                 String[] strs = new String[c];\r
  23                 for (int i=0; i<c; i++) strs[i] = (String) b.createRandom(i);\r
  24                 \r
  25                                 \r
  26                 {\r
  27                         ByteArrayOutputStream baos = new ByteArrayOutputStream( 10*1024*1024 );\r
  28                         DataOutputStream dos = new DataOutputStream( baos );            \r
  29                         System.gc();\r
  30                         long x = System.nanoTime();\r
  31                         for (int i=0; i<c; i++) {\r
  32                                 dos.writeUTF(strs[i]);\r
  33                         }\r
  34                         long y = System.nanoTime() - x;\r
  35                         System.out.println("DataOutputStream.writeUTF: "+y);\r
  36 \r
  37                         byte[] data = baos.toByteArray();\r
  38                         DataInputStream dis = new DataInputStream( new ByteArrayInputStream( data ) );\r
  39                         x = System.nanoTime();\r
  40                         for (int i=0; i<c; i++) {\r
  41                                 dis.readUTF();\r
  42                         }\r
  43                         y = System.nanoTime() - x;\r
  44                         System.out.println("DataOutputStream.readUTF : "+y);\r
  45                 }\r
  46                 \r
  47                 {\r
  48                         Charset cs = Charset.forName("UTF8");\r
  49                         ByteArrayOutputStream baos = new ByteArrayOutputStream( 10*1024*1024 );\r
  50                         DataOutputStream dos = new DataOutputStream( baos );            \r
  51                         System.gc();\r
  52                         long x = System.nanoTime();\r
  53                         for (int i=0; i<c; i++) {\r
  54                                 byte[] data = strs[i].getBytes(cs);\r
  55                                 dos.writeInt(data.length);\r
  56                                 dos.write(data);\r
  57                         }\r
  58                         long y = System.nanoTime() - x;\r
  59                         System.out.println("String#getBytes(cs)      : "+y);\r
  60 \r
  61                         \r
  62                         byte[] strData = new byte[1024];\r
  63                         byte[] data = baos.toByteArray();\r
  64                         DataInputStream dis = new DataInputStream( new ByteArrayInputStream( data ) );\r
  65                         x = System.nanoTime();\r
  66                         for (int i=0; i<c; i++) {\r
  67                                 int len = dis.readInt();\r
  68                                 dis.read(strData, 0, len);\r
  69                                 new String(strData, cs);\r
  70                         }\r
  71                         y = System.nanoTime() - x;\r
  72                         System.out.println("new String(byte[], cs)   : "+y);\r
  73                 }\r
  74                 \r
  75                 \r
  76         }\r
  77 \r
  78 }\r