A Concern to ease benchmarking methods and allow for file output

benchmarkable.rb

module Benchmarkable
  extend ActiveSupport::Concern

  class_methods do
    attr_reader :benchmarkable_file_path

    def benchmark_to(file_path)
      @benchmarkable_file_path = file_path
    end
  end

  included do
    def report(label, &block)
      result = nil
      File.open(self.class.benchmarkable_file_path, "a") do |f|
        report = Benchmark.bm do |x|
          x.report(label) do
            result = block.call
          end
        end

        f.write("user     system      total        real\n")
        report.each_entry do |entry|
          f.write(label.to_s + entry.to_s)
        end
      end

      result
    end
  end
end