* Faster Write implementation
- Use Unsafe.CopyBlockUnaligned to copy bytes to the
WritableBuffer. This is temporary until we get newer
corefx bits with a better span.CopyTo implementation.
- Remove WritableBufferExtensions from Performance project
- Split method into WriteFast and WriteMultiBuffer
- Cache the span for the common case where
the buffer is non empty.
- Use ref locals instead of pinning pointers in fast path
- Changed socket output to be based on pipelines
- Changed connection filter glue to be based on pipelines
- Codegen that used `MemoryPoolIterator` for output now uses `WritableBuffer`
- Made `UvWriteReq` async/await friendly with `LibuvAwaitable<T>`
- Deleted MemoryPool and friends
Improves compliance with RFC 7230 on the expected handling of requests
that have URI or asterisk in the request target.
This means rejecting asterisk requests that are not OPTIONS and rejecting
authority-form requests taht are not CONNECT.
This also means the server will handle the path and query on targets
with absolute URIs as request-targets.
* Made changes to TakeSingleHeader
- Remove state machine and just parse in place
- Inline OnHeader into TakeSingleHeader
- Use IndexOfVectorized instead of custom indexof
- Normalize header whitespace error
- Combine IndexOf and IndexOfAny into a single IndexOfNameEnd call
- Attempt at making the reader better for multispan parsing
- Try tighter inner loop
- Fix boundary case and clean code up
- Update the cursor once instead of after every header
- Fix errors with not updating consumed state on incomplete header payload
- Filled a test hole, removed a condition that should never happen
- Avoid struct copies every iteration when parsing headers
- Added a fast path for single span in the start line parsing
- Added a fast path for single span header parsing
- Changed the out header loop to be pointer based (instead of slicing)
* Make the IHttpParser per frame and add a reset
- Made the IHttpParser a per frame object so state can be stored
across method calls and parses.
- Added HttpParserFactory to ServiceContext
- Less passes over the buffer
- Single pass to find all start line delimiters instead
of calling IndexOf multiple times.
- Made TakeStartLine and TakeMessageHeaders a state machine
- Only check length against remaining bytes once
- Change variable names to match TakeStartLine
- Use ReadableBuffer.First.Span instead of ToSpan()
- Added test for missing path with a querystring