Global Interpreter Lock limits Ruby concurrency
7/10 HighMRI Ruby's Global Interpreter Lock (GIL) prevents true parallelism. While Fibers and async libraries provide some help, Ruby cannot match the seamless concurrency capabilities of Go's goroutines or Elixir's lightweight processes.
Sources
- Why we still build with Ruby in 2026 - Lago Blog
- The Future of Ruby: Is It Still Relevant in 2025 and Beyond? – The ...
- July 26, 2025 – The Rails Drop
- Deconstructing a Hype: What People Think Is Wrong With Ruby?
- Why Ruby Is Not Widely Used: An In-Depth Analysis
- Why we still build with Ruby in 2026 - DEV Community
Collection History
Query: “What are the most common pain points with Ruby for developers in 2025?”4/8/2026
Ruby has a Global Interpreter Lock (GIL) in MRI, which limits real parallelism. While Fibers and async gems (`async`, `polyphony`, `concurrent-ruby`) help, it's not as seamless as Go's goroutines or Elixir's lightweight processes.
Created: 4/8/2026Updated: 4/8/2026