ruby--ruby/benchmark/vm_ivar_lazy_set.yml

prelude: |
  class Example
    def lazy_set
      @uninitialized ||= 123
    end
  end

  objs = 10000000.times.map { Example.new }  
benchmark:
  vm_ivar_lazy_set: |
    objs.each(&:lazy_set)    
loop_count: 1