Polyphony VS Concurrent Ruby

Compare Polyphony vs Concurrent Ruby and see what are their differences.

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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Polyphony Concurrent Ruby
22 16
653 5,631
0.3% 0.3%
8.3 7.4
about 2 months ago about 1 month ago
C Ruby
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Polyphony. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-10-16.
  • Should You Be Scared of Unix Signals?
    8 projects | news.ycombinator.com | 16 Oct 2023
    When using green threads/fibers/coroutines, an interesting technique to make signal handling safer is to run the signal handler asynchronously on a separate fiber/green thread. That way most of the problems of dealing with signals go away, and there's basically no limitation on what you can do inside the signal handler.

    I've successfully used this technique in Polyphony [1], a fiber-based Ruby gem for writing concurrent programs. When a signal occurs, Polyphony creates a special-purpose fiber that runs the signal handling code. The fiber is put at the head of the run queue, and is resumed once the currently executed fiber yields control.

    [1] https://github.com/digital-fabric/polyphony

  • Polyphony 1.4 Released
    2 projects | /r/ruby | 2 Jul 2023
    Read the release notes here: https://github.com/orgs/digital-fabric/discussions/110 The Polyphony docs: https://www.rubydoc.info/gems/polyphony The Polyphony repository: https://github.com/digital-fabric/polyphony
  • Polyphony: Fine-Grained Concurrency for Ruby
    3 projects | news.ycombinator.com | 12 May 2023
  • Polyphony 0.99 released. Last release before 1.0!
    2 projects | /r/ruby | 9 Mar 2023
    Polyphony is a gem for building highly-concurrent Ruby programs. It utilizes Ruby fibers to provide a high-performance safe environment for launching any number of concurrent operations. Under the hood, Polyphony employs io_uring to maximize I/O performance (libev is used on platforms other than recent Linux kernels).
  • Polyphony – Fine-grained concurrency for Ruby
    1 project | news.ycombinator.com | 14 Nov 2021
  • About that monkey-patching business...
    1 project | dev.to | 4 Nov 2021
    Is monkey-patching inherently bad? Should its use make Polyphony illegitimate? These are the questions I'm exploring in my latest article.
  • Async Ruby
    7 projects | /r/ruby | 30 Oct 2021
    how is this diff from: https://github.com/digital-fabric/polyphony
  • Embracing Infinite Loops with Ruby and Polyphony
    1 project | dev.to | 13 Oct 2021
    Infinite loops are great for expressing long-running concurrent operations. In this article I’ll discuss the use of infinite loops as a major construct when writing concurrent apps in Ruby using Polyphony. I’ll show how infinite loops differ from normal, finite ones; how they can be used to express long-running tasks in a concurrent environment; and how they can be stopped. Read it now!
  • What's new in Polyphony and Tipi - August 2021 edition
    2 projects | dev.to | 27 Aug 2021
    Polyphony is a library for writing highly concurrent Ruby apps. Polyphony harnesses Ruby fibers and a powerful io_uring-based I/O runtime to provide a solid foundation for building high-performance concurrent Ruby apps.
  • Sorbet Compiler: An experimental, ahead-of-time compiler for Ruby
    6 projects | news.ycombinator.com | 30 Jul 2021
    > Curious if there’s anything public about improving ruby performance from the I/O angle mentioned in the post.

    I'm currently working on Polyphony [0], a Ruby gem for writing highly-concurrent Ruby apps. It uses Ruby fibers under the hood, and does I/O using io_uring (on Linux, there is also a libev-based backend).

    [0] https://github.com/digital-fabric/polyphony

Concurrent Ruby

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.

What are some alternatives?

When comparing Polyphony and Concurrent Ruby you can also consider the following projects:

Async Ruby - An awesome asynchronous event-driven reactor for Ruby.

EventMachine - EventMachine: fast, simple event-processing library for Ruby programs

Celluloid - Actor-based concurrent object framework for Ruby

render_async - render_async lets you include pages asynchronously with AJAX

Opal-Async - Non-blocking tasks and enumerators for Opal.

ruby-vips - Ruby extension for the libvips image processing library.

tipi - Tipi - the All-in-one Web Server for Ruby Apps

Sequel - Sequel: The Database Toolkit for Ruby