grade property

String get grade

Performance grade based on jank rate and avg frame time

Implementation

String get grade {
  if (jankRate == 0 && avgBuildMs < 8) return 'A';
  if (jankRate < 5 && avgBuildMs < 12) return 'B';
  if (jankRate < 15 && avgBuildMs < 16) return 'C';
  if (jankRate < 30) return 'D';
  return 'F';
}