module Benchmark::IPS::Helpers

def humanize_duration(duration_ns)
  if duration_ns < 1000
    "%.2f ns" % duration_ns
  elsif duration_ns < 1_000_000
    "%.2f μs" % (duration_ns / 1000)
  elsif duration_ns < 1_000_000_000
    "%.2f ms" % (duration_ns / 1_000_000)
  else
    "%.2f s" % (duration_ns / 1_000_000_000)
  end
end