class Add
  attr_reader :result, :is_negative
  def initialize(a, b)
    @result = a + b
    @is_negative = @result < 0
  end
end


def add(a,b)
  result = a + b

  { result: result, is_negative: (result < 0) }
end


require 'benchmark/ips'

Benchmark.ips do |x|
  x.report("hash return") { foo = Add.new(1, 2); foo.result; foo.is_negative }
  x.report("obj return ") { foo = add(1, 2); foo[:result]; foo[:is_negative] }
  x.compare!
end

# Warming up --------------------------------------
#          hash return   534.436k i/100ms
#          obj return    695.817k i/100ms
# Calculating -------------------------------------
#          hash return      5.490M (± 2.8%) i/s -     27.791M in   5.065681s
#          obj return       7.062M (± 4.1%) i/s -     35.487M in   5.034689s

# Comparison:
#          obj return :  7062192.3 i/s
#          hash return:  5490408.9 i/s - 1.29x  (± 0.00) slower