Chris Titus recently vlogged about an article showing that KDE 5.17 is now smaller than XFCE 4.14 in memory usage. The article says that in their tests, XFCE actually uses more RAM than KDE. I was very interested in this, but I couldn’t quite believe it and so I ran my own tests.
First of all, we need to compare apples to apples. I created an OpenSUSE VM using Vagrant with KVM/libvirt. It had 4 cores and 4192MB of RAM. This VM has no graphical interface at all. As soon as I got it up, I took the first “No X” measurement. After patching using zypper dup, I took the second “No X” reading. Every reading in this blog post was using the free -m command. I then shut down the VM and cloned it 3 times so each copy should be completely the same.