struct-member-benchmark.rb

require 'benchmark'

class MemberClass
  def initialize(a, b, c, d, e, f, g)
    @a = a
    @b = b
    @c = c
    @d = d
    @e = e
    @f = f
    @g = g
  end
  attr_reader :a, :b, :c, :d, :e, :f, :g
end

StructClass = Struct.new(:a, :b, :c, :d, :e, :f, :g)

COUNT = 10000000

Benchmark.bmbm do |x|
  x.report("member") do
    COUNT.times do
      m = MemberClass.new(0, 0, 0, 0, 0, 0, 0)
      m.a + m.b + m.c + m.d + m.e + m.f + m.g
    end
  end

  x.report("struct") do
    COUNT.times do
      m = StructClass.new(0, 0, 0, 0, 0, 0, 0)
      m.a + m.b + m.c + m.d + m.e + m.f + m.g
    end
  end
end


# Rehearsal ------------------------------------------
# member   8.870000   0.070000   8.940000 (  8.988045)
# struct   6.960000   0.070000   7.030000 (  7.106504)
# -------------------------------- total: 15.970000sec
# 
#              user     system      total        real
# member   9.140000   0.120000   9.260000 (  9.596857)
# struct   6.780000   0.070000   6.850000 (  7.079937)