Duplex seems to create unnecessary copies of Buffer data #162

var stream = require('readable-stream');

var duplex = new stream.Duplex({
    write: function(chunk, enc, cb) {
        this.push(chunk);
        cb();
    },
    read: function() {}
});

var bufA = new Buffer('a');

var writable = new stream.Writable({
    write: function (chunk, enc, cb) {
        assert.strictEqual(chunk, bufA, 'should be the same instance');
    }
});

duplex.pipe(writable);

duplex.write(bufA);