Sort of.

fast-json-stream.js

var util = require('util'),
    Stream = require('stream');

var FastJSONStream = exports.FastJSONStream = function (options) {
  this.bufferSize = options.bufferSize;
  this._buffer = new Buffer(this.bufferSize);
};
util.inherits(FastJSONStream, Stream);

FastJSONStream.prototype.write = function (chunk) {
  var data;

  chunk.copy(this._buffer, this._buffer.lenght);

  try {
    this.emit('data', JSON.parse(this._buffer));
    this._buffer = new Buffer(this.bufferSize);
  }
  catch (_) {}
};