1 Netty is a high-performance NIO (New IO) client server framework for Java that Twitter uses internally as a protocol agonostic RPC system.
2 Twitter found some problems with Netty 3's memory management for buffer allocations beacause it generated a lot of garbage during operation.
3 When you send as many messages as Twitter it creates a lot of GC pressure and the simple act of zero filling newly allocated buffers consumed 50% of..