Useful little debug tool to place various time reference points into a program. Useful for coarse profiling when excessive detail is not required.

micro_profile.rb

def time_point(name)
  $time_points ||= {}
  $time_points[name] = [] if !$time_points.has_key? name
  $time_points[name] << Time.now
end

def time_report
  return if !defined? $time_points
  report_time = Time.now
  report = "Since %-30s: %f seconds"
  $time_points.each do|name, vals|
    if vals.size == 1
      puts report % [name, report_time - vals.first]
    else
      vals.each_index {|i| puts report % ["#{name}[#{i}]", report_time - vals[i]]}
    end
  end
end