AstonJ

AstonJ

Rails console using 100% CPU in dev (fix)

If you are experiencing Rails console using 100% CPU on your dev machine, then updating your development and test gems might fix the issue - at least that’s what worked for me. Here’s my old and new (old versions are commented out):

# group :development do
#   # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
#   gem 'web-console', '>= 3.3.0'
#   gem 'listen', '>= 3.0.5', '< 3.2'
#   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
#   gem 'spring'
#   gem 'spring-watcher-listen', '~> 2.0.0'
# end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 4.1.0'
  # Display performance information such as SQL time and flame graphs for each request in your browser.
  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
  gem 'rack-mini-profiler', '~> 2.0'
  gem 'listen', '~> 3.3'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
end

# group :test do
#   # Adds support for Capybara system testing and selenium driver
#   gem 'capybara', '>= 2.15'
#   gem 'selenium-webdriver'
#   # Easy installation and use of web drivers to run system tests with browsers
#   gem 'webdrivers'
# end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 3.26'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

Hope this saves someone a few hours of faffing around trying to troubleshoot the issue! :upside_down_face:

Most Liked

ohm

ohm

It was probably listen. listen 3.3.0 fixed a lot of threading and process problems.

ohm

ohm

I’ve had some trouble with spring just sitting there as well. spring is used to preload the app, so you can tear down and start up a server or console snappy.

Where Next?

Popular Backend topics Top

DevotionGeo
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
New
AstonJ
I’ve seen more and more people get into Rust recently, so thought it would be cool to have a thread for people to share what they like ab...
New
First poster: bot
The Emerging Architectures for Modern Data Infrastructure. Five years ago, if you were building a system, it was a result of the code yo...
New
DevotionGeo
How Dgraph was running out of memory for some users, and how Go’s Garbage collector wasn’t enough, and Dgraph team used jemalloc to manag...
New
First poster: bot
proposal: Go 2: permit types to say they may only be created by containing package · Issue #43123 · golang/go. It would be useful to per...
New
AstonJ
And the blog: Rails has been unapologetically full stack since the beginning. We’ve continuously sought to include ever-more default an...
New
mafinar
I’ll be participating. This would be very interesting because I have been having coders block + a lot of distraction this weekend. But l...
New
KnowledgeIsPower
MongoDB, Cassandra, DynamoDB and etc. Also, do you use VM or container to run it?
New
apoorv-2204
Hi everyone, I’m considering pursuing the Elixir/Erlang certification exam offered by Erlang Solutions and wanted to check in with the c...
New
geo
I found a collection of code snippets for getting visitor ip address from api.geoipapi.com/json for blocking malicious ip addresses or ha...
New

Other popular topics Top

New
AstonJ
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
AstonJ
poll poll Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...
New
PragmaticBookshelf
Tailwind CSS is an exciting new CSS framework that allows you to design your site by composing simple utility classes to create complex e...
New
PragmaticBookshelf
Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser. ...
New
Maartz
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
New
PragmaticBookshelf
Rails 7 completely redefines what it means to produce fantastic user experiences and provides a way to achieve all the benefits of single...
New
New
PragmaticBookshelf
Programming Ruby is the most complete book on Ruby, covering both the language itself and the standard library as well as commonly used t...
New
PragmaticBookshelf
Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...
New