class RepeatingBenchmark

  require 'benchmark'

  def self.measure(&block)


    Benchmark.measure do
      1000.times(&block)
    end

  end

  def self.warm_up(&block)
    # ensure that everything that needs to be lazy instantiated is
    block.call

    # and if it's JRuby, warmup takes A LOT LONGER :)
    if Config::CONFIG['ruby_install_name'] == 'jruby'
      STDERR.puts "Warming up JIT"
      10000.times { block.call }
      STDERR.puts "Done"
    end
  end

  def self.report(description, &block)
    self.warm_up(&block)
    10.times do
      log "#{description}: #{ measure(&block) }"
    end
  end

  def self.log(message) 
    File.open("#{RAILS_ROOT}/log/benchmark.log", "a") { |f| f.puts message }
  end

end


# shortcut for console work
def bm(&block)
  RepeatingBenchmark.measure(&block).to_s
end