Here's some initial tests. I also included JVM memory usage, to help understand the data. I don't think I have the disruptor completely worked out, as it seems really, really slow. One thing I did notice is that the default LBQ setting on MBassador used up to 1 GB of ram. Changing it to have an LBQ of size 16 dropped it to about 512 MB without affecting too much. The disruptor with a ring buffer of size 16 uses ~62 MB. I suspect pooling objects would help.

Linked Blocking Queue (size:Integer.MAX_VALUE)

Linked Blocking Queue (size:16)

Disruptor (2 worker) + ReflectASM