rblineprof

require 'rblineprof'

profile = lineprof(/./) do
  sleep 0.001

  100.times do
    sleep 0.001

    1*2*3
    4*5*6
    7*8*9*10*11*12*13*14*15
    2**32
    2**128
  end
end

file = profile.keys.first

File.readlines(file).each_with_index do |line, num|
  wall, cpu, calls, allocations = profile[file][num + 1]

  if wall > 0 || cpu > 0 || calls > 0
    printf(
      "% 5.1fms + % 6.1fms (% 4d) | %s",
      cpu / 1000.0,
      (wall - cpu) / 1000.0,
      calls,
      line
    )
  else
    printf "                          | %s", line
  end
end

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