SwiftNIO 1.6.0

Semver Minor

• Added new UnsafeEmbeddedAtomic type. (#373)
• Added prepend, removeLast, and last to CircularBuffer. (#347)

Semver Patch

• Removed warnings in Swift 4.2. (#374)
• Added more license documentation for 3rd party modules. (#251)
• Fixed an issue where connect promises could be leaked without being failed. (#337)
• Reduced the number of memory allocations required to create an EventLoopFuture. (#373)
• ByteBuffer's debug output is now compatible with being parsed by xxd. (#367)
• Fixed a bug where WebSocket frames could be delivered multiple times on connection closure. (#368)
• ByteBuffer.discardReadBytes no longer triggers a memory copy if the buffer was fully consumed. (#363)
• Improved the ability of the compiler to specialise ByteBuffer copies of contiguous data types. (#360)
• Worked around an optimiser bug that caused unnecessary heap allocations when writing StaticString objects into ByteBuffers. (#354)
• Added dtrace scripts for debugging memory allocations. (#352)
• Greatly reduced the overhead of passing HTTPRequestHead and HTTPResponseHead around the ChannelPipeline by placing them into a CoW heap-allocated box. (#351)
• Shrunk the size of ByteBuffer and FileRegion to fewer than 3 words, ensuring that enums that wrap these types can still fit into an existential container without triggering heap allocation. (#349)
• Fixed a bug where the HTTPServerPipelineHandler would incorrectly deliver message parts out of order. (#348)
• Fixed a bug where Channel.localAddress and Channel.remoteAddress would be nil during channelInactive and handlerRemoved callbacks. (#346)
• Improved the performance of HTTPHeaders[canonicalForm:] in the case where no headers with that header name exist. (#344)
• Miscellaneous code & testing improvements. (#335, #338, #353, #356, #357, #358, #361, #362, #365, #366, #371, #375, #376)
• Documentation improvements. (#359)