This post delves into the recent optimizations made to Erlang/OTP 27, particularly focusing on record updates. It traces the history of optimizations starting from Erlang/OTP 22 and highlights key improvements introduced in subsequent versions. A significant enhancement in Erlang/OTP 27 is the optimization of record operations, along with multiple minor optimizations aiming to streamline code efficiency. The post provides detailed examples of how these optimizations work, particularly in updating records in place to generate less garbage and improve performance. While the impact on garbage collection is debated, the overall expectation is that these optimizations will enhance program performance, especially for larger records.
https://www.erlang.org/blog/optimizations/