Twitter introduces “Diffy,” an open source tool, acting as a helping hand for the software developers to catch bugs, test and compare results without writing much code. Twitter modifies portions of its complex code on a timely basis, and Diffy is packed with such advanced automated techniques that it helps Twitter in its smooth workflow and optimized performance. The tool’s highlighted feature is its modern noise cancelation technique, which is considered as a niche element when measured to other comparison based regression analysis tools.
Source: https://thehackernews.com/2015/09/diffy-open-source.html