Casting gem usage in Rails 4/Ruby 2 vs. Rails 4 push for concern usage/Rails delegation

rubyonrails-core
1

Just read about the Casting gem:

https://discuss.gemnasium.com/t/casting-adding-behavior-to-objects-without-using-extend/34 https://github.com/saturnflyer/casting

What are the Rails core team’s opinions about using Casting vs. ActiveSupport::Concern usage, Rails delegation, etc.?

2

Seems to me like AS::Concern and Casting deal with significantly different use cases: modular functionality at class-load time vs. modular functionality at runtime.

Also, the benchmark noting the 100x speed difference compared to standard method dispatch is pretty hair-raising.

--Matt Jones