I have recently jumped ship from openSsue LXDE to XFCE and tried to use btrfs as sugested that it is ready for daily use.
Not the tricky thing - LXDE gave me a small amount of ram used but XFCE which should be only a bit more resource hungry can eat up as much as 3GB of ram when LXDE with same aplications launched used 1,6 GB.
Here is the set up:
Lenovo ThinkPad Edge
all setings from automated instalation.
An here is the memory usage with only chromium started:
fw190@linux-fmoh:~> free -ht total used free shared buffers cached Mem: 3,7G 2,2G 1,5G 0B 24K 1,5G -/+ buffers/cache: 690M 3,1G Swap: 4,0G 1,1M 4,0G Total: 7,7G 2,2G 5,5G