Using JRuby - What, When, How, and Why

This talk introduces JRuby and explains how to get started and decide when to use it. It examines JVM features, memory and warmup behavior, and Rails performance through an end-to-end blog example and ActiveRecord benchmarks.

Syllabus

Intro
Thank You Yarden!
Cheers to Tom Enebo
What is JRuby?
Ruby Compatibility
Why Ruby on JVM?
JVM Tools and GC
JRuby Install
JRuby on Rails?
activerecord-jdbc-adapter
What Matters to You?
Memory Footprint
Warmup Over Time
Benchmarks Lie
End-to-end Rails Blog
ActiveRecord Performance
Select Performance
Update Performance
True Story
JRuby Future
JRuby on Rails Future