This post explores the new optimizations for record updates as well as some of the other improvements. It also gives a brief historic overview of recent optimizations leading up to Erlang/OTP 27. A brief history of recent optimizations # The modern history of optimizations for Erlang begins in January 2018. We had realized that we had reached the limit of the optimizations that were possible working on BEAM code in the Erlang compiler. Erlang/OTP 22 introduced a new SSA-based intermediate repres...