computeMissedFrameBuildBudgetCount method

int computeMissedFrameBuildBudgetCount ([Duration frameBuildBudget = kBuildBudget ])

The number of frames that missed the kBuildBudget and therefore are in the danger of missing frames.

Implementation 

int computeMissedFrameBuildBudgetCount([Duration frameBuildBudget = kBuildBudget]) => _extractFrameDurations()
  .where((Duration duration) => duration > kBuildBudget)
  .length;