I created Pull Request Size. It’s a GitHub app that you can install from here. It will tell you how large your Pull Requests are based on the lines of code changed.
I’ve found that it’s a helpful reminder to always keep Pull Requests as small as possible! I think we know this scenario all too well.
10 lines of code = 10 issues.— I Am Devloper (@iamdevloper) November 5, 2013
500 lines of code = "looks fine."
The project is on github at https://github.com/noqcks/pull-request-size.