- Optimisations: A couple of low

There are a couple of areas for valuable optimisation if
anyone would like to take them:

1)

One is that generating JMS message ids before sending can
slow things down significantly (maybe 5%??).

I noticed that if i set producer.setDisableMessageID(true)
on the producer before sending performance increases
significantly

I am sending 1k non persistent bytes messages from client
one my laptop to server on another machine with gigabit lan
and i can get about 45K msgs / sec , but this
drops to about 40K or less with disablemessageid set to
false

I suspect this is due to the following in
JBossMessageProducer:

  | String id = UUID.randomUUID().toString();
  | bm.setJMSMessageID("ID:" + id);
  | 

which involves generation and two (?) string copies.

What we need is a way of generating the id without doing
String copies - you could take the same UUID algorithm and
apply it directly to a SimpleString instance (with the id
already included at the beginning).

2) Text messages. Currently text message bodies are encoded
using UTF-8 with the encoding methods on the MINA IoBuffer
class. This is slow (as mentioned in another thread).

I'm sure there is great scope to speed this up.



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