before Visit (from this page tab) = 960 MB
visiting url = ~2.2 GB
after visit (back to this post in memory) = ~980 MB
nothing strange though nice page with that mixed flash content for testing things like JPG rendering efficiency and Flash playback behavior @ load of those massive amounts of (progressive encoded) pictures on the same site
i guess those 20 MB though got stuck somewhere in the Flash part.
No visible memory leak though, test was done with D2D disabled.
See my Namoroka tests (exactly those 2,x memory usage) yeah it indeed used to need less memory then when Minefield started but GC is a nice compromise of cleaning this load after visit (after some seconds it gets wiped out of memory), and it works well, though as you say if the subjective improvement between 3.6 and 4.0 is zero you could ask the question for what double the memory is needed for this kind of picture page rendering now, and what benefits you get from this specific page with double the memory used while visiting (compared to Namoroka) ?)