Rails 3.1 is very slow in development-mode because of assets, what to do?

ruby-on-rails ruby-on-rails-3.1 sprockets
jonepatr picture jonepatr · Sep 23, 2011 · Viewed 10.8k times · Source

After I added Sprockets, Rails is loading very slow in development mode, what should I do to speed it up?

Answer

Nevir picture Nevir · Sep 24, 2011

Take a look at https://github.com/wavii/rails-dev-tweaks.

Rails is running all of the to_prepare hooks on every Sprockets asset request in development mode. This includes things like auto-(re)loading your code, and various gems sneak work in there too.

rails-dev-tweaks disables to_prepare & reloading on any asset request (and a few others - read the first part of its README). Speeds up your dev environment by a huge amount for any decently sized project. It's also configurable to do this for any additional requests you like

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