moment/moment — pull request #1885 by hupfis (2014-08-26 13:13:53+00:00)
Title: Performance optimization isBefore/isAfter/isSame

- optimized performance of isBefore/isAfter/isSame by using valueOf and
not momentizing/cloning already existing moment objects
- 90% performance improvement when using without specific unit and the
input is already a moment object

reviewed by PatrickBic