b47fc77522
This pull request introduces the new default ByteBufAllocator implementation based on jemalloc, with a some differences: * Minimum possible buffer capacity is 16 (jemalloc: 2) * Uses binary heap with random branching (jemalloc: red-black tree) * No thread-local cache yet (jemalloc has thread-local cache) * Default page size is 8 KiB (jemalloc: 4 KiB) * Default chunk size is 16 MiB (jemalloc: 2 MiB) * Cannot allocate a buffer bigger than the chunk size (jemalloc: possible) because we don't have control over memory layout in Java. A user can work around this issue by creating a composite buffer, but it's not always a feasible option. Although 16 MiB is a pretty big default, a user's handler might need to deal with the bounded buffers when the user wants to deal with a large message. Also, to ensure the new allocator performs good enough, I wrote a microbenchmark for it and made it a dedicated Maven module. It uses Google's Caliper framework to run and publish the test result (example) Miscellaneous changes: * Made some ByteBuf implementations public so that those who implements a new allocator can make use of them. * Added ByteBufAllocator.compositeBuffer() and its variants. * ByteBufAllocator.ioBuffer() creates a buffer with 0 capacity.
The Netty Project
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
Links
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Web Site: http://netty.io/
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Docs: http://netty.io/docs/
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Blog: http://netty.io/blog/
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Twitter: @netty_project
Getting Netty
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Download Page: http://netty.io/downloads/
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Maven Repository:
<dependencies>
...
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty</artifactId>
<version>X.Y.Z.Q</version>
<scope>compile</scope>
</dependency>
...
</dependencies>
Developer Information
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Netty is setup to build using Maven
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You need JDK 7 to build Netty. Netty will run with JDK 5 (3.x) and JDK 6 (4).
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master branch contains code for Netty 4.x
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3 branch contains code for Netty 3.x