Release
What's new in RubyGems and Bundler 4.1
The Brief
- Ruby Weekly issue #826 (November 12, 2026) features an article on RubyGems and Bundler 4.1.
- The issue also includes a piece on Rails metaprogramming, which notes that Active Record generates 21 methods for every column.
- The metaprogramming article says a define_method trick can reduce the memory cost of those generated methods.
Why it matters
Developers using RubyGems, Bundler 4.1, or Rails may want to review the new Bundler and RubyGems changes, and understanding how Active Record defines column methods can help when reasoning about memory use in large apps.
Who’s affected
- Ruby developers
- Bundler users
- Rails teams
- Bundler 4.1
- #ruby
- #rubygems
- #bundler
- #rails
- #metaprogramming
#826 — November 12, 2026 Read on the Web Ruby Weekly Metaprogramming on a Budget — A "peek behind the curtain of Rails' metaprogramming magic!" Active Record generates 21 methods for every column, which could eat a lot of memory, but a little define_method trick allows methods…