Using JRuby - What, When, How, and Why

Explore the world of JRuby in this 30-minute conference talk from RubyConf 2022. Discover what JRuby is, when to use it, how to get started, and why it matters for Ruby developers. Learn about the recent update for Ruby 3.1 support and understand why many Ruby shops choose JRuby for its exceptional concurrency, garbage collection, just-in-time compilation, and cross-platform capabilities. Gain insights into JRuby's compatibility, installation process, and its use with Rails. Examine performance benchmarks, memory footprint, and real-world applications. Delve into topics such as ActiveRecord performance, JVM tools, and the future of JRuby and JRuby on Rails.

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