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Concurrency in Modern Ruby🧵

Advanced

Ruby 4.0.1

Master parallel and concurrent programming in Ruby 4.0.1. Threads, Fibers, and the completely redesigned Ractor API with Ports, join, and value methods.

5

Sections

21

Lessons

22

Challenges

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21 lessons and 22 challenges, all 100% free.

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Threads & Mutex

Thread Lifecycle & Exceptions

Thread Safety(Sign in required)

Intermediate+20 Mana

Thread Exceptions(Sign in required)

Intermediate+20 Mana

Avoiding Deadlocks

GVL Benefits(Sign in required)

Advanced+30 Mana

Deadlock Prevention(Sign in required)

Advanced+30 Mana

Fibers: Cooperative Concurrency

The Fiber Scheduler Interface

Fiber Communication(Sign in required)

Intermediate+20 Mana

Fiber Error Handling

Fiber Scheduler Purpose(Sign in required)

Intermediate+20 Mana

Fiber vs Thread(Sign in required)

Advanced+30 Mana

Fiber Cleanup Behavior(Sign in required)

Advanced+30 Mana

Ractors in Ruby 4.0

Ractor::Port Communication

Ruby 4.0 Ractor API(Sign in required)

Intermediate+20 Mana

Sharing Data Between Ractors

Ractor Communication(Sign in required)

Intermediate+20 Mana

Ractor.select, Monitoring, and Storage

Moving vs Copying(Sign in required)

Intermediate+20 Mana

Ractor Errors and Lifecycle

Ractor Error Types(Sign in required)

Advanced+30 Mana

Shareable Procs(Sign in required)

Advanced+30 Mana

Condition Variables

Thread-Safe Queues

ConditionVariable Mechanics(Sign in required)

Intermediate+20 Mana

Atomic Operations

Queue Blocking Behavior(Sign in required)

Intermediate+20 Mana

Synchronization Patterns

Synchronization Primitives(Sign in required)

Advanced+30 Mana

Compare-and-Set Result(Sign in required)

Advanced+30 Mana

Spurious Wakeup Guard(Sign in required)

Intermediate+20 Mana

Choosing the Right Tool

Error Handling in Concurrent Code

Match Scenario to Primitive(Sign in required)

Intermediate+20 Mana

Testing Concurrent Code

Ractor Exception Handling(Sign in required)

Intermediate+20 Mana

Production Concurrency Patterns

Graceful Shutdown Sequence(Sign in required)

Advanced+30 Mana

SizedQueue Backpressure(Sign in required)

Intermediate+20 Mana

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21 interactive lessons and 22 hands-on challenges — learn in VS Code, Cursor, or the web.