Conceal strings

function greet(name) {
  return "Hello, " + name;
}

var _stringPool = " lo,He";
var _stringPayload = [0, 4, 7, 2, 2, 6, 2],
  _stringMetadata = [0, 7, 4, 5],
  _stringCache = [null],
  _stringDecoder = function (_entry) {
    var _cached = _stringCache[_entry];
    if (_cached !== null) return _cached;
    var _result = "",
      _record = _entry * 4,
      _start = _stringMetadata[_record],
      _length = _stringMetadata[_record + 1],
      _stringKey = _stringMetadata[_record + 2],
      _stringStep = _stringMetadata[_record + 3];
    for (var _position = 0; _position < _length; _position++) {
      var _stringMask = _stringKey + _position * _stringStep & 7;
      _result += _stringPool[_stringPayload[_start + _position] ^ _stringMask];
    }
    _stringCache[_entry] = _result;
    return _result;
  };
function greet(name) {
  return _stringDecoder(0) + name;
}