Peek into how much time each line of your Rails application takes throughout a request. Things this peek view provides: - Total time it takes to render individual lines within your codebase - Total network time spent waiting per line You can also drill down to only certain parts of your codebase like: - app, everything within Rails.root/(app|lib) - views, everything within Rails.root/app/view - gems, everything within Rails.root/vendor/gems - all, everything within Rails.root - stdlib WWW: https://github.com/peek/peek-rblineprof