BPM Performance tuning

Hi,

I have a synchronous BPM that has

1.receive (open s/a bridge)

2.transform

3.sync send

4.transform

5.sync send

6.transform

7.send (close s/a bridge)

working (except for some merge issues in step 4). The BPM takes too long (up to a minute) to execute. How do I optimize the performance? Where can I find tips on how to tune the performance of a Bpm?

I have to use the BPM in this scenario because I need stateful processing where I have to merge messages from step 1 and step 3.

Thanks and Regards,

Suresh.