Hacker News Reader

Possibly for ruby on rails users, they would be better off working with crystal.

Switching languages (and therefore frameworks) seems excessive.

Are there any alternative Ruby interpreters/compilers that potentially use less memory?

Not really, there are been numerous tries but nothing these days. You can use less memory hungry libraries like hanami instead of Rails, for example.

These is one of the option but I felt like it was a bit early to use.