Profiling ruby code

dev_profiler.rb

# https://github.com/ruby-prof/ruby-prof
require 'ruby-prof'

class DevProfiler
  BASE_PATH = "#{Rails.root}/tmp/performance/#{file_name}"
  def self.prof(file_name)
    RubyProf.start
    puts "Start profiling method"
    yield
    puts "Done Profiling!"
    results = RubyProf.stop
    
    # Print a flat profile to text
    File.open "#{BASE_PATH}-graph.html", 'w' do |file|
      RubyProf::GraphHtmlPrinter.new(results).print(file)
    end

    File.open "#{BASE_PATH}--flat.txt", 'w' do |file|
      RubyProf::FlatPrinterWithLineNumbers.new(results).print(file)
    end

    File.open "#{BASE_PATH}--stack.html", 'w' do |file|
      RubyProf::CallStackPrinter.new(results).print(file)
    end
  end
end