Fast PRNG in dart

gistfile1.txt

class FastRandom {
  int seed;
  FastRandom() {
    seed = new DateTime.now().millisecondsSinceEpoch & 0x7FFF;
  }
  
  int nextInt() {
    seed = (214013 * seed + 2531011) & 0x7FFFFFFF;
    return (seed >> 16) & 0x7FFF;
  }
  
  num nextNumRange(num low, num high) {
    return low + nextNum() * (high - low);
  }
  
  num nextNum() {
    return nextInt() / 0x7FFF;
  }
}