Int32 vs Float64 performances in Crystal

int32_vs_float64.cr

# https://stackoverflow.com/questions/60910274/int32-vs-float64-performances-in-crystal
require "benchmark"

def percentage_diff(number_a, number_b)
  small_number = (number_a > number_b) ? number_b : number_a
  big_number = (number_a < number_b) ? number_b : number_a

  (big_number - small_number) / small_number
end

def maximum_minimum(number_a, number_b)
  small_number = (number_a > number_b) ? number_b : number_a
  big_number = (number_a < number_b) ? number_b : number_a

  {maximum: big_number, minimum: small_number}
end

percentage_diff(32, 31)

res = 0
res2 = 0.0

Benchmark.ips do |x|
  x.report("int32") do
    a = percentage_diff(128973, 119236)
    b = percentage_diff(119236, 128973)

    d = maximum_minimum(117232, 123462)

    res = a + b + d[:maximum] - d[:minimum]
  end

  x.report("float64") do
    a = percentage_diff(1.28973, 1.19236)
    b = percentage_diff(1.19236, 1.28973)

    d = maximum_minimum(1.17232, 1.23462)

    res2 = a + b + d[:maximum] - d[:minimum]
  end
end

puts res
puts res2