Comment 144 for bug 125970

the one with 100 positionned elements is definitely choppy and eats 100% CPU while scrolling (tested with Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9b4pre) Gecko/2008021404 Minefield/3.0b4pre ID:2008021404). Works perfectly on the same machine which has decent current hardaware (core 2 duo 2Ghz, 2GB ram, Nvidia 8400M card) with Firefox 2, so this is a performance regression.