Simple memory used and time spent script

analyzer.rb

require 'benchmark'

class Analyzer
  def self.print_memory_usage
    memory_before = `ps -o rss= -p #{Process.pid}`.to_i
    yield
    memory_after = `ps -o rss= -p #{Process.pid}`.to_i

    puts "Memory: #{((memory_after - memory_before) / 1024.0).round(2)} MB"
  end

  def self.print_time_spent
    time = Benchmark.realtime do
      yield
    end

    puts "Time: #{time.round(2)}"
  end
end