It won't affect production performance. It syncs copy in the background, so no requests to copycopter.com are performed during requests to the client application.

We worked hard to make sure it wasn't making lots of HTTP requests. The way the client library works is it runs a background polling thread and syncs to the Copycopter service every 300 seconds (this number is configurable), caching all the edited copy locally in the Rails app.

https://github.com/thoughtbot/copycopter_client