Vishwajeetsingh Desurkar & Ishani Trivedi - Concurrency Showdown: Threads vs. Fibers

Our conference talk explores the subtle yet impactful enhancements in concurrency in Ruby 3.0. Through optimized Global VM Lock handling, upgraded fiber scheduling, and language improvements, we will demonstrate how these enhancements profoundly influence parallel tasks and boost efficiency in concurrent Ruby applications. Attendees will gain insights into the interplay between Ruby's language upgrades and concurrency optimizations, empowering them with effective strategies to maximize performance. Join us for a comprehensive understanding of concurrency in Ruby 3.0's models and their real-world impact.

[@rajaravivarmar]

I don't get it. You say that GIL prevents threads from executing in parallel, then in the last slide you suggest to use Threads for CPU intensive tasks. Did we suddenly start using JRuby or something? And example of Fibers in action would have been nice.

[@iMagesh]

Yes GIL prevents threads from executing in parallel. Threads can be used best for IO-intensive tasks and not CPU-intensive. Ractors are best for CPU-intensive tasks.

[@sangeetatrivedi499]

Very nice