[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Optimisations: A couple of low hanging fruits going for

[trustin]

"timfox" wrote : "trustin" wrote : 
  |   | 
  |   | for (int i = 0; i < str.length(); i ++) {
  |   |     buf.putChar(str.charAt(i));
  |   | }
  | 
  | Well... UTF-8 is just putting a sequence of bytes generated from bitwise operations on the chars? So should be fast right?
  | 
  | Maybe the overhead is due to the creation of the encoder class etc, I don't really know I haven't profiled it yet...
  | 
  | Maybe we should just write our own encoding that writes directly onto a SimpleString...

Yes, the creation of a CharsetEncoder takes a lot of time and therefore cached somewhere.  String.getBytes() uses ThreadLocal for this purpose, but if you already have some context object that stores the decoding/encoding state, then you can just add a field there.



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