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

bot
A new item has been posted: This thread was posted automatically, if you feel it could be in a better category and are at Trust Level ...
New
First poster: bot
Multicore OCaml: October 2020. Welcome to the October 2020 multicore OCaml report, compiled by @shakthimaan, @kayceesrk and of course my...
New
First poster: bot
About Self Self is a prototype-based dynamic object-oriented programming language, environment, and virtual machine centered around the p...
New
finner
I’ve never really felt 100% comfortable using the enum type because of my lack of understanding how it is constructed . . . . . . until ...
New
AstonJ
If you are experiencing Rails console using 100% CPU on your dev machine, then updating your development and test gems might fix the issu...
New
mudasobwa
To promote Tarearbol.DynamicManager I created the :heart_eyes_cat:-language (which is a brainfuck dialect.) Code outputting “Meow” to th...
New
DevotionGeo
What do you people do for reading Erlang docs? Is there something like Ruby’s ri? I installed manual pages for Erlang under /usr/local/...
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
Reinis
I’ve been diving into Bridgetown (a Jekyll successor) and learning about writing a more maintainable CSS.
New
apoorv-2204
I’m experimenting with Hexagonal / Clean Architecture in Elixir. The classic Behaviour + Impl split works great for mocking and isolating...
New

Other popular topics Top

Devtalk
Hello Devtalk World! Please let us know a little about who you are and where you’re from :nerd_face:
New
siddhant3030
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...
New
PragmaticBookshelf
Design and develop sophisticated 2D games that are as much fun to make as they are to play. From particle effects and pathfinding to soci...
New
AstonJ
There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....
New
PragmaticBookshelf
Learn different ways of writing concurrent code in Elixir and increase your application's performance, without sacrificing scalability or...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
AstonJ
If you get Can't find emacs in your PATH when trying to install Doom Emacs on your Mac you… just… need to install Emacs first! :lol: bre...
New
Help
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
New
First poster: bot
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
New
New