byte-stream/docs/resource-streams.md

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Resource Streams	/resource-streams

This package abstracts PHP's stream resources with ResourceInputStream and ResourceOutputStream. They automatically set the passed resource to non-blocking and allow reading and writing like any other InputStream / OutputStream. They also handle backpressure automatically by disabling the read watcher in case there's no read request and only activate a write watcher if the underlying write buffer is already full, which makes them very efficient.