ReadAllWithBuffer is a fork of https://go.googlesource.com/go/+/go1.16.3/src/io/io.go#626 with a buffer to read into.

ReadAllWithEstimate is a fork of https://go.googlesource.com/go/+/go1.16.3/src/io/io.go#626 with a starting buffer size.

BufferedReaderAt implements io.ReaderAt but extends and buffers reads up to the given buffer size.

BufferedWriterWithQueue is an attempt at writing an async queue of outgoing data to the underlying writer.