There seems to be a problem with the flash player:
1. enable a flash wallpaper
2. switch to its desktop
3. launch htop
4. you can see that for each activated desktop with the flash wallpaper there are 2 processes instead of one.

this is eating much more memory and affects performance i believe.

the player for the flash used on my device is kmplayer and i can see 6 of its processes when i enable 3 different flash wallpapers.
if i disable them, all processes are gone.