什么是buffered-stream，A writable and readable stream with bufferisation
This module create a Stream which implement both the writer and reader API. The content written to the stream is buffered at a defined size and later flushed into the final destination stream. Use the buffered stream to increase writing speed.
The example below will buffer the data from i readable stream and send them to a writeable stream as 16 Mo chunks.
buffered = require('buffered-stream'); reader = createStreamReader(); buffer = buffered(4*1024*1024); writer = createStreamWriter(); reader.pipe(buffer).pipe(writer);
David Worms: <https://github.com/wdavidw>