Learn to Program, 3rd Edition

Exercises from Chapter 13

Even Better Profiling

(Found here.)

Modify your profile method so you can turn all profiling on and off by changing only one word.

How You Could Do It

def profile(block_description, &block)
  # To turn profiling on/off, set this to true/false.
  profiling_on = false 

  if profiling_on
    start_time = Time.new
    block.call

    duration = Time.new - start_time
    puts "#{block_description}: #{duration} seconds"
  else
    block.call
  end
end

How I Would Do It

$OPT_PROFILING_ON = false 

def profile(block_description, &block)
  if $OPT_PROFILING_ON
    start_time = Time.new
    block[]
    duration = Time.new - start_time
    puts "#{block_description ...