KDE 4.0.0 uses more ram than KDE 3.5.8 in my system. I installed exmap and sorted by Effective Resident memory usage column, and launched kmix,konsole,konqueror with two tabs,ksnapshot,klipper and kwrite. Both without composite activated and within Kubuntu Gutsy freshly started in a machine with 900Mb of RAM and no swap usage. The result: total memory usage with KDE 3.5.8 is 123Mb, and with KDE 4.0.0 is 161Mb. I used the mentioned applications to do a similar test to the one done in [1]. -- [1] <a href="http://www.jarzebski.pl/read/kde-3-5-vs-4-0-round-two.so">http://www.jarzebski.pl/read/kde-3-5-vs-4-0-round-two.so </a>