code: func FastMarshal(v interface{}) ([]byte, error) {
  	data, err := jsoniter.ConfigFastest.Marshal(v)
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  
  	return data, nil
  }
docs: // FastMarshal uses the json-iterator library for fast JSON marshalling.
  // Note, this function marshals floats with 6 digits precision.