BlazeDS,GraniteDS, LiveCycleDS, WebOrb for Java which gives best performance?

Does anyone have experiance in a lot of these?

I'm not so intrested in the pdf creation part of LCDS.

Just for flex messaging which would give me the best performance? As far as I know LCDS and WebOrb both do real time streaming is that correct?

Basically the question is which gives quickest response and which will allow for most 开发者_运维技巧client connected to a single servlet container.

Thanks

Edit 1 This may be clearer what I want. I'm looking to server at least 5000 clients with sub second response times with push messages, I'm trying to figure out which is the most scalable option, I've been quoted several million push messages a day. Obviously we can throw more servers at the problem I'm not convinced thats the most maintainable option.

Its not media streaming I'm looking for, but more event updates. It must work without sticky sessions.

LiveCycleDS & WebOrb are the only ones providing messaging using sockets through RTMP protocol. Note that in this case the clients are not connected to a servlet container, but to a dedicated server included in the product distribution (bypassing the servlet mechanism). There are more messaging servers on the market, Lightstreamer is one of them. Or Flash media server.

There are many more things to be taken into consideration when choosing a solution however (price, integration with various architectures (like DMZ) and frameworks, paid support, documentation, your relation with the sales representative etc).