persistent connection timeout), then HTTP 1.1 would help.
Apache SOAP will not be the right choice for you.
There are a number of other aspects of Apache SOAP that affect performance.
the receiver of a message will construct an entire DOM for that message.
parse a message stream in a more CPU-efficient manner.
not.  There are other free implementations, although not open source.
Graham's GLUE is available for free in some circumstances.
> of my performancy problem?