this is a simple application to get a rough idea of how postmessage performs when you send LOTS OF DATA through it.

Running the test:

1. clone me
2. git submodule init
3. git submodule update
4. open pmtest.html in your favorite browser

Some sample performance numbers:

To send a gigabyte of data between two frames via postMessage on my macbook pro:

• Firefox 4: 39.5s
• Chrome 10: 55.8s
• Safari 5: 15.3s