Long Outputs Inside Emacs Cider Repl Buffers

When using Emacs with the Cider plug-in, moving inside the REPL buffer gets incredibly slow, when there was accidently printed a huge amount of output to the REPL buffer.

• Is there a way to configure Leiningen (or nrepl?) to limit the number of lines that are allowed to be printed by one evaluation in the repl?
• Is there maybe a way to let Emacs clear the buffer after the output happened?

Thanks in advance!

Have you tried setting *print-length*? See this documentation and search for 'Limiting output in the REPL'.