Shard Detail

sidekiq v0.7.0

Simple, efficient job processing for Crystal

Install & Use

Add the following code to your project's shard.yml under:

dependencies to use in production
- OR -
development_dependencies to use in development

  github: mperham/


Build Status

Sidekiq is a well-regarded background job framework for Ruby. Now we're bringing the awesomeness to Crystal, a Ruby-like language. Why? To give you options. Ruby is friendly and flexible but not terribly fast. Crystal is statically-typed, compiled and very fast but retains a similar syntax to Ruby.

Rough, initial benchmarks on macOS 10.14.5, ruby 2.7.2:

Runtime RSS Time Throughput
Sidekiq 6.2.0 55MB 16.4 6,100 jobs/sec
Sidekiq 6.2.0/hiredis 49MB 13.0 7,900 jobs/sec
Crystal 0.35.1 15MB 3.8 26,000 jobs/sec

If you have jobs which are CPU-intensive or require very high throughput, Crystal is an excellent alternative to native Ruby extensions. It compiles to a single executable so deployment is much easier than Ruby.

Getting Started

Please see the wiki for in-depth documentation and how to get started using in your own app.

Support is community-supported and not commercially supported by @mperham and Contributed Systems. General maintenance and bug fixes are always welcomed.

Help wanted

See the issues for chores and other ideas to help.

Things that do not exist and probably won't ever:

  • Support for daemonization, pidfiles, log rotation - use Upstart/Systemd
  • Delayed extensions - too dynamic for Crystal

The Ruby and Crystal versions of Sidekiq must remain data compatible in Redis. Both versions should be able to create and process jobs from each other. Their APIs are not and should not be identical but rather idiomatic to their respective languages.


Mike Perham,, @getajobmike / @sidekiq