How to test latency of Flex messages

I have a system where clients connect via http stream开发者_Python百科ing channels and use Producer and Consumer classes to dispatch and receive messages. I need to test the latency of messages in a way that adequately simulates real-world usage when the server is under load. I have 3 ideas for how this may be accomplished. Has anyone tried and succeeded or failed with these methods?

1. Use an out-of-the box test system like JMeter. Haven't found any that support streaming yet.

2. Use Selenium and FlexMonkey on BrowserMob to simulate actual users.

3. Use a client api (possibly from BlazeDS) that supports streaming and Flex messaging to write a custom testing framework. Haven't found a client api that supports streaming yet, any language would be OK.

There is a tool for testing the performance of BlazeDS/LCDS, created by Adobe. Take a look here (there is a PDF file called Adobe LiveCycle Data Services 3 ES2 Performance Brief in the PDF portofolio, having a couple of attachments) .