Yahoo! Has Open Sourced YSlow
Yahoo! has decided to open source YSlow. Developers no longer need to submit feature requests to Yahoo!, being able to improve the tool themselves. Comparing YSlow with Google Page Speed.
After many years of making it freely available under Mozilla Public License MPL 1.1, Yahoo! has decided to open source YSlow under a BSD license. The Yahoo! Exceptional Performance group used to gather feedback from the community in order to improve the tool. Developers can now do whatever they want with the tool. Marcel Duran, a Yahoo! Frontend Engineer who’s been in charge of the project, has made the YSlow code available on GitHub, inviting developers to fork the code and make pull requests that will later will be merged back into the development repository if accepted. Duran will also update the add-ons across all supported browsers. From now on, the community will no longer depend on Yahoo! to implement certain feature requests.
Both tools analyze pages on a set of rules listed below:
Besides analyzing the pages, the tools suggest changes that are meant to improve the web page loading speed.