Concurrent Ruby

Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns. (by ruby-concurrency)
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ruby-concurrency.github.io
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Concurrent Ruby Alternatives

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better Concurrent Ruby alternative or higher similarity.
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Concurrent Ruby reviews and mentions

Posts with mentions or reviews of Concurrent Ruby. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-09-11.
  • A Tour of Go Examples in Ruby
    1 project | news.ycombinator.com | 16 Mar 2024
  • Exploring concurrent rate limiters, mutexes, semaphores
    2 projects | dev.to | 11 Sep 2023
    After this, I took a look at the semaphore class in the popular library, concurrent-ruby to see how they implement it, and I learnt about something new: condition variables. And Ruby comes with this included!
  • My Adventure with Async Ruby
    1 project | news.ycombinator.com | 3 Sep 2023
    https://github.com/ruby-concurrency/concurrent-ruby has great docs if someone is looking for alternatives.
  • My Adventure With Async Ruby
    1 project | /r/ruby | 23 Jan 2023
    I wonder how this would compare to using concurrent-ruby under ruby 2.7, especially in a real-world setting (where the calls are actually to external services that return and buffer data, instead of just sleep). The author says that he's felt that ruby threads "feel easy to mess up," but I've found that concurrent-ruby makes it pretty simple, and performant enough even with the GIL.
  • Using Concurrent::Promise while rescuing exceptions in Ruby
    2 projects | dev.to | 12 Aug 2022
    As I could not find a clear example about how to rescue exceptions from Concurrent::Promises (part of the Concurrent Ruby gem ) I read through the documentation and here are two examples: one that documents success case and one that shows what is happening when there is an error.
  • Ask HN: Any efforts to remove the GIL for Ruby?
    2 projects | news.ycombinator.com | 15 Jun 2022
    In a sense the GIL (or actually GVL as it's called in current ruby versions) has already been removed for ruby.

    It's only the original MRI Ruby that still has it several over Ruby implementations already removed it. e.g. JRuby.

    Concurrent-Ruby[1] is probably a good place to start if you want to work with GVL free ruby on JRuby. It's quite well supported and is currently used by Rails.

    If you just want async or non-blocking IO I'd take a look at the Async Gem[2]. It looks pretty solid in Ruby > 3.0 and it's been invited by Matz to be part of the stdlib, which I think is a pretty good endorsement.

    For MRI itself I don't think it's likely they'll ever remove the GVL. Ractors are probably a better solution for CPU concurrency in the long run, although I think they're pretty experimental currently.

    1. https://github.com/ruby-concurrency/concurrent-ruby

  • Intro to Thread-safety in Ruby on Rails
    1 project | /r/ruby | 23 Mar 2022
    I like how the article exposes you to tools to prove/disprove the problem. I would have hoped it introduced to tools like concurrent ruby and the use of atomics like u/Freeky already mentioned though.
  • How to get results from Concurrent::Promise::all?
    1 project | /r/ruby | 11 Mar 2022
    Using conccurrent-ruby, how can I execute a set of promises and then get the results?
  • Ruby 3.1.0 Released
    3 projects | /r/programming | 25 Dec 2021
    I’d highly recommend the concurrent-ruby gem that has implementations of various metaphors of concurrency, from async to promises, as well as edge features such as actors.
  • Using Thread.new
    1 project | /r/rails | 29 Apr 2021
    You may want to consider using something like concurrent-ruby that provides nice abstractions over multithreading.
  • A note from our sponsor - WorkOS
    workos.com | 25 Apr 2024
    The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning. Learn more →

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Basic Concurrent Ruby repo stats
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7.4
18 days ago

ruby-concurrency/concurrent-ruby is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.

The primary programming language of Concurrent Ruby is Ruby.

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