[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Strings Experiments...

[clebert.suconic@jboss.com]

I just placed a class called UTFUtil (not being used for now), and a test on timing validating the performance.

I'm getting these numbers with org.jboss.messaging.tests.timing.util.UTF8Test:


  | Time WriteUTF = 3271
  | Time WriteUTF = 3061
  | Time WriteUTF = 3058
  | Time WriteUTF = 3044
  | Time WriteUTF = 3055
  | Time readUTF = 4166
  | Time readUTF = 4137
  | Time readUTF = 4153
  | Time readUTF = 4144
  | Time readUTF = 4151
  | time NewUTF = 3003
  | time NewUTF = 2849
  | time NewUTF = 2834
  | time NewUTF = 2832
  | time NewUTF = 2837
  | spentTime readUTFNew = 3207
  | spentTime readUTFNew = 3179
  | spentTime readUTFNew = 3179
  | spentTime readUTFNew = 3180
  | spentTime readUTFNew = 3181
  | 


And these numbers after changing ChannelBufferWrapper to:

   public ChannelBufferWrapper(final int size)
  |    {
  |       buffer = ChannelBuffers.buffer(size);
  |       buffer.writerIndex(buffer.capacity());
  |    }
  | 
  | 


  | Time WriteUTF = 3338
  | Time WriteUTF = 3054
  | Time WriteUTF = 3077
  | Time WriteUTF = 3094
  | Time WriteUTF = 3076
  | Time readUTF = 4181
  | Time readUTF = 4158
  | Time readUTF = 4236
  | Time readUTF = 4270
  | Time readUTF = 4276
  | time NewUTF = 2961
  | time NewUTF = 2988
  | time NewUTF = 2974
  | time NewUTF = 2959
  | time NewUTF = 2977
  | spentTime readUTFNew = 3093
  | spentTime readUTFNew = 3126
  | spentTime readUTFNew = 3144
  | spentTime readUTFNew = 3121
  | spentTime readUTFNew = 3134
  | 
  | 




  | Time WriteUTF = 3338
  | Time WriteUTF = 3054
  | Time WriteUTF = 3077
  | Time WriteUTF = 3094
  | Time WriteUTF = 3076
  | Time readUTF = 4181
  | Time readUTF = 4158
  | Time readUTF = 4236
  | Time readUTF = 4270
  | Time readUTF = 4276
  | time NewUTF = 2961
  | time NewUTF = 2988
  | time NewUTF = 2974
  | time NewUTF = 2959
  | time NewUTF = 2977
  | spentTime readUTFNew = 3093
  | spentTime readUTFNew = 3126
  | spentTime readUTFNew = 3144
  | spentTime readUTFNew = 3121
  | spentTime readUTFNew = 3134
  | 
  | 



If we decide to use this UTF code, it is as simple as:


   public void putUTF(final String str) throws Exception
  |    {
  |       UTFUtil.saveUTF(this, str);
  |    }
  | 
  | 


I will let you guys (Tim) to decide if we should use it or not.

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