Whenever I open the terminal to install something from the repositories, it takes like 1 minute to 'build' them and all that junk. I recently switched from Ubuntu and apt never had this issue. What can I do to reduce this?
Zypper auto-refreshes the repos when you run it. Disable it.
Head over to YaST, click on Software and then Software Repositories.
Next,Select the repo, and ensure that Automatically refresh is disabled.