Simple benchmarking util

benchmarking.rb

# Usage:
# $bm = Benchmarking.new
# VisitGeneratorWorker.new.perform(work_order.id)
# $bm.finish

# $bm.results
#
# Inside what you're benchmarking:
# $bm.mark("This is a data point")
#
# Output:
#
#+------------+--------------+--------------+
#| Identifier | Differential | Overall Time |
#+------------+--------------+--------------+
#| Start      | 0.0          | 0.0          |
#| End        | 13.181004    | 13.181004    |
#+------------+--------------+--------------+
#
class Benchmarking
  def initialize
    @start_time = Time.now
    @marks = [["Start", @start_time]]
  end

  def mark(identifier= "")
    @marks << [identifier, Time.now]
  end

  def finish
    mark("End")
  end

  def results
    rows = []
    last_time = @start_time
    @marks.each do |mark|
      identifier, time = mark
      rows << [identifier, time - last_time, time - @start_time]
    end

    table = Terminal::Table.new :headings => ['Identifier', 'Differential', 'Overall Time'], :rows => rows

    puts table
  end
end