class Puma::Cluster

def workers_to_cull(diff)
  workers = @workers.sort_by(&:started_at)
  # In fork_worker mode, worker 0 acts as our master process.
  # We should avoid culling it to preserve copy-on-write memory gains.
  workers.reject! { |w| w.index == 0 } if @options[:fork_worker]
  workers[cull_start_index(diff), diff]
end