How to skip Sprockets asset compile during Capistrano deployment
Prefer to configure Capistrano so Sprockets can reuse its asset cache: https://makandracards.com/makandra/60699-capistrano-speeding-up-sprockets-asset-compile-during-deploy
For applications coming with lots of stylesheets and scripts, asset compilation might take quite long. This can be annoying when deploying a release that does not actually change assets.
When your app uses Sprockets, you can simply skip asset compilation and re-use the previous release's assets. 
That is especially easy via Capistrano. Capistrano will automatically symlink your release's
public/assets to a shared directory, so all you need to do is skip the
Put the following code where you'd put other custom Capistrano tasks (default is
if ENV['SKIP_ASSETS'] Rake::Task['deploy:assets:precompile'].clear_actions end
You can then set the above environment variable when deploying:
SKIP_ASSETS=1 cap staging deploy
 Sprockets will pick any
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