class RubyProf::FlameGraphPrinter

def flame_data_json
  threads = @result.threads.map do |thread|
    {
      id: thread.id,
      fiber_id: thread.fiber_id,
      total_time: thread.total_time,
      data: build_flame_data(thread.call_tree)
    }
  end
  # Disable JSON nesting limit (default 100) so deep call trees serialize.
  # See https://github.com/ruby-prof/ruby-prof/issues/353
  JSON.generate(threads, max_nesting: false)
end