Currently under Rails 5.2.1 / Ruby 2.5.1 and I quickly had enough of System.out.prin… oops, enough of puts. Anyway. I just want to track what happens in my application: how many milliseconds is taken by this method? Was this called before that? What happened before this error? And such. To get the info, logging is our messiah. Hallelujah…or not. As starters, here are some global Rails-independent