ruby--ruby/benchmark/vm_attr_ivar_set.yml

prelude: |
  class C
    attr_accessor :a, :b
    def initialize
      @a = nil
      @b = nil
    end
  end
  obj = C.new
benchmark:
  vm_attr_ivar_set: |
    obj.a = 1
    obj.b = 2
loop_count: 30000000