Use ReadAtLeast(Async)

[bgrainger]

For most reads, the desired length is known (4 bytes for packet header, or len bytes for packet content).

Consider using ReadAtLeast(Async) on newer frameworks to specify the desired amount to read. Note that this would need to be simulated in SocketByteHandler since Socket doesn't have an AtLeast API.

MySqlConnector/src/MySqlConnector/Protocol/Serialization/StreamByteHandler.cs

Line 33 in 59bb840

bytesRead = m_stream.Read(buffer);