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Motivation: ChannelOutboundBuffer is basically a circular array queue of its entry objects. Once an entry is created in the array, it is never nulled out to reduce the allocation cost. However, because it is a circular queue, the array almost always ends up with as many entry instances as the size of the array, regardless of the number of pending writes. At worst case, a channel might have only 1 pending writes at maximum while creating 32 entry objects, where 32 is the initial capacity of the array. Modifications: - Reduce the initial capacity of the circular array queue to 4. - Make the initial capacity of the circular array queue configurable Result: We spend 4 times less memory for entry objects under certain circumstances.
Netty Project
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
Links
How to build
For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.
You require the following to build Netty:
- Latest stable Oracle JDK 7
- Latest stable Apache Maven
- If you are on Linux, you need additional development packages installed on your system, because you'll build the native transport.
Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.
Branches to look
The 'master' branch is where the development of the latest major version lives on. The development of all other versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.