module Bootsnap

def log_stats!
  stats = {hit: 0, revalidated: 0, miss: 0, stale: 0}
  self.instrumentation = ->(event, _path) { stats[event] += 1 }
  Kernel.at_exit do
    stats.each do |event, count|
      $stderr.puts "bootsnap #{event}: #{count}"
    end
  end
end