 For software developers, the Portland Project has released a set of common interfaces that allows applications to integrate across many desktop environments.A 2011 test by Phoronix with the default installation of Ubuntu 10.04 showed that LXDE 0.5's memory utilization was lower than that of Xfce 4.6, which in turn was lower than that of GNOME 2.29, with KDE 4.4 using the most RAM compared to the aforementioned desktops.In 2015, it was demonstrated in benchmarks that LXDE performed slightly faster than Xfce overall (in the average of all tests), using the Fedora Linux operating system.