prelude: |
  class TheClass
    def initialize
      @levar = 1
      @v0 = 1
      @v1 = 2
      @v3 = 3
    end

    def set_value_loop
      # 100k
      i = 0
      while i < 100_000
        # 10 times to de-emphasize loop overhead
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        i += 1
      end
    end
  end

  class Generic < Time
    def initialize
      @levar = 1
      @v0 = 1
      @v1 = 2
      @v3 = 3
    end

    def set_value_loop
      # 100k
      i = 0
      while i < 100_000
        # 10 times to de-emphasize loop overhead
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        i += 1
      end
    end
  end

  obj = TheClass.new
  gen_obj = Generic.new

  class SomeClass
    @levar = 1
    @v0 = 1
    @v1 = 2
    @v3 = 3

    def self.set_value_loop
      # 100k
      i = 0
      while i < 100_000
        # 10 times to de-emphasize loop overhead
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        @levar = i
        i += 1
      end
    end
  end

benchmark:
  vm_ivar_set_on_instance: |
    obj.set_value_loop
  vm_ivar_set_on_generic: |
    gen_obj.set_value_loop
  vm_ivar_set_on_class: |
    SomeClass.set_value_loop
loop_count: 100