export function augmentParserWithThroughput(Parser) {
  const {Decoder, Encoder} = Parser;
  // Decoder.
  Decoder.throughput = 0;
  const {parseBinary} = Decoder.prototype;
  Decoder.prototype.parseBinary = function (obj) {
    Decoder.throughput += obj.length || obj.byteLength;
    return parseBinary.call(this, obj);
  };
  // Encoder.
  Encoder.throughput = 0;
  const {pack} = Encoder.prototype;
  Encoder.prototype.pack = function (packet) {
    const buffer = pack.call(this, packet);
    Encoder.throughput += buffer.length || buffer.byteLength;
    return buffer;
  };
  return Parser;
}