benchmarking the new `caller_locations` against `caller`

caller_locations_benchmark.rb

require 'fruity'

def whoze_there_using_caller
  caller[0][/`([^']*)'/, 1]
end    

def whoze_there_using_locations
  caller_locations(1,1)[0].label
end    

def test(stack_level = 0)
  return test(stack_level-1) unless stack_level <= 0
  compare do
    using_caller    { whoze_there_using_caller }
    using_locations { whoze_there_using_locations }
  end
end

test
puts "With a longer stacktrace:"
test(100)

# =>
# using_locations is faster than using_caller by 46x ± 1.0
# With a longer stacktrace:
# Running each test 1024 times. Test will take about 3 seconds.
# using_locations is faster than using_caller by 101x ± 10.0