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

    def set_value_loop
      # 1M
      i = 0
      while i < 1000000
        # 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

benchmark:
  vm_ivar_set_on_instance: |
    obj.set_value_loop
loop_count: 100