Dive into the world of Ruby metaprogramming with this conference talk from RubyConf 2021. Explore the development journey of MemoWise, Ruby's most performant memoization gem, as presenters Jemma Issroff and Jacob Evelyn share insights on achieving fast method metaprogramming. Learn about benchmark-driven development, unexpected object allocations, and the power of eval. Discover common performance issues in Ruby metaprogramming and uncover arcane techniques to overcome them. Gain valuable knowledge on optimizing dynamically generated methods and enhancing overall Ruby application performance.