gistfile1.txt

var stream = require('stream');

var r = new stream.Readable({
  highWaterMark: 0, //What exactly is the behaviour with a 0 buffer?
  read: function() {
    console.log('Read');
    
    this.push('abc');
  }
});

//`read` is called twice? The same happens when piping into another stream with highWaterMark: 0 or 1
r.on('data', function(data) {
  r.pause();
});