ruby tailcall optimization

gistfile1.rb

RubyVM::InstructionSequence.compile_option = { 
  tailcall_optimization: true,
  trace_instruction: false
} 

eval <<end
  def fact(n, result = 1)
    if n == 1
      result
    else
      fact(n - 1, n * result)
    end
  end
end

p fact(30_000)