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Ractors_Slide_Deck.pdf

Avatar for Abiodun Olowode Abiodun Olowode
September 12, 2025
Programming
6
0

 Ractors_Slide_Deck.pdf

This is the slide deck of my Ractor’s talk from Helvetic Ruby 2023.

Avatar for Abiodun Olowode

Abiodun Olowode

September 12, 2025

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Transcript

  1. A Sneak Peek Into Ractors Abiodun Olowode

  2. Concurrency Vs Parallelism

  3. What is Concurrency?

  4. Concurrency

  5. Threads

  6. Core Usage Observation

  7. Hardware Overview • Model Name: MacBook Pro • Model Identifier:

    Mac14,9 • Chip: Apple M2 Pro • Total Number of Cores: 10 (6 performance and 4 efficiency) • Memory: 16 GB • System Firmware Version: 10151.1.1 • OS Loader Version: 10151.1.1
  8. None
  9. None

  10. What is Parallelism?

  11. Parallelism

  12. Core Usage Observation

  13. None

  14. What are Ractors?

  15. Ractor is designed to provide a parallel execution of Ruby

    without thread-safety concerns. Ruby Documentation 15

  16. • Achieving Parallelism Purpose of Ractors • Eliminating thread safety

    concerns • Race Conditions • Data Races • Deadlock/Livelock issues
  17. None
  18. None

  19. Characteristics of Ractors • Are unable to access any objects

    through variables not defined within their scope
  20. None
  21. None

  22. Shareable and Unshareable Objects

  23. None
  24. None

  25. Characteristics of Ractors • Are unable to access any objects

    through variables not defined within their scope • Communicate via sending and receiving messages • Process one message at a time (FIFO)
  26. None
  27. None
  28. None
  29. None

  30. We experience freedom from • Race conditions and Data races

    • The overhead of using locks for synchronization • The need to trace all state mutations to debug thread safety issues

  31. Are we totally thread safe?

  32. Ractor thread-safety concerns • Class/Module objects are shareable but can

    be modified in a multi-Ractor program • Blocking operations can still occur via waiting send, waiting yield and waiting take

  33. Are Ractors right for my project?

  34. Things to Consider • Speed

  35. Things to Consider • Speed

  36. Things to Consider • Speed • Compatibility

  37. Things to Consider • Speed • Compatibility • Environment

  38. Consideration Yes No/Maybe/Slowly Speed Computation Object Creation Compatibility New Projects

    Already existing projects Environment Test Production – start at non- critical points to build trust and observe, then expand

  39. Ractors are a parallel execution feature in Ruby, inspired by

    the actor model in which each Ractor operates independently, helping mitigate thread safety concerns. Abiodun Olowode PRESENTATION TITLE
  40. None

  41. Thank You! Twitter - @AbiodunAjibade3 LinkedIn – Abiodun Olowode