Fast hash function in Dart

fast_hash.dart

/// FNV-1a 64bit hash algorithm optimized for Dart Strings
int fastHash(String string) {
  var hash = 0xcbf29ce484222325;

  var i = 0;
  while (i < string.length) {
    final codeUnit = string.codeUnitAt(i++);
    hash ^= codeUnit >> 8;
    hash *= 0x100000001b3;
    hash ^= codeUnit & 0xFF;
    hash *= 0x100000001b3;
  }

  return hash;
}

// From: https://isar.dev/recipes/string_ids.html#fast-hash-function
// Avoid using string.hashCode because it is not guaranteed to be stable across different platforms and versions of Dart.