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! 
Most Liked
ohm
It was probably listen. listen 3.3.0 fixed a lot of threading and process problems.
1
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.
1
Popular Backend topics
Which server-side languages are you most interested in right now? Anything new or relatively new that’s caught your eye? Maybe an older l...
New
New
This Python script mimics Babbage’s Difference Engine.
In Use this Python script to simulate Babbage’s Difference Engine, Python offered...
New
What's so exciting about Postgres? with Craig Kerstiens (The Changelog #417).
PostgreSQL aficionado Craig Kerstiens joins Jerod to talk ...
New
I’ve recently become interested in Elixir and all it’s neat perks. And since I’m currently working on a messaging platform; elixir seems ...
New
I’ve never really felt 100% comfortable using the enum type because of my lack of understanding how it is constructed . . .
. . . until ...
New
In case anyone else is wondering why Ruby 3 doesn’t show when you do asdf list-all ruby :man_facepalming: do this first:
asdf plugin-upd...
New
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
Cross posting from Elixir Forum.
Build it with Phoenix is a nice course by Geoffrey Lessel @geo. But if you start with Phoenix 1.7.2 or ...
New
Hi everyone,
Does anyone know when will “Agile Web Development in Rails 8” by Pragmatic Bookshelf release. I’m eager to dive into the la...
New
Other popular topics
Hello Devtalk World!
Please let us know a little about who you are and where you’re from :nerd_face:
New
Algorithms and data structures are much more than abstract concepts. Mastering them enables you to write code that runs faster and more e...
New
I know that -t flag is used along with -i flag for getting an interactive shell. But I cannot digest what the man page for docker run com...
New
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
Build highly interactive applications without ever leaving Elixir, the way the experts do. Let LiveView take care of performance, scalabi...
New
Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...
New
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig.
General-purpose programming language and toolchain for maintaini...
New
I’m able to do the “artistic” part of game-development; character designing/modeling, music, environment modeling, etc.
However, I don’t...
New
Node.js v22.14.0 has been released.
Link: Release 2025-02-11, Version 22.14.0 'Jod' (LTS), @aduh95 · nodejs/node · GitHub
New
Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...
New
Categories:
Sub Categories:
Popular Portals
- /elixir
- /rust
- /ruby
- /wasm
- /erlang
- /phoenix
- /keyboards
- /python
- /js
- /rails
- /security
- /go
- /swift
- /vim
- /clojure
- /java
- /haskell
- /emacs
- /svelte
- /onivim
- /typescript
- /kotlin
- /c-plus-plus
- /crystal
- /tailwind
- /react
- /gleam
- /ocaml
- /flutter
- /elm
- /vscode
- /ash
- /html
- /opensuse
- /zig
- /centos
- /deepseek
- /php
- /scala
- /react-native
- /lisp
- /sublime-text
- /textmate
- /nixos
- /debian
- /agda
- /django
- /kubuntu
- /deno
- /arch-linux
- /nodejs
- /revery
- /ubuntu
- /manjaro
- /spring
- /diversity
- /lua
- /julia
- /markdown
- /slackware








