Comment 35 for bug 1672297

If I press the Ubuntu key over and over, showing the overview of all the desktops, and then again to return to the normal view of the current desktop, RSS for gnome-desktop increases rapidly (measurements taken at 15-second intervals.

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 15805 9.0 1.2 4776896 820820 tty2 Sl+ 10:10 12:27 /usr/bin/gnome-shell
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 15805 9.0 1.2 4790452 831004 tty2 Rl+ 10:10 12:31 /usr/bin/gnome-shell
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 15805 9.1 1.2 4799632 849868 tty2 Sl+ 10:10 12:36 /usr/bin/gnome-shell
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 15805 9.1 1.3 4807764 859832 tty2 Sl+ 10:10 12:42 /usr/bin/gnome-shell
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 15805 9.2 1.3 4812364 865236 tty2 Sl+ 10:10 12:46 /usr/bin/gnome-shell

After kill -1 15805, I get:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
skelem 27800 14.5 0.5 4072104 362428 tty2 Sl+ 12:31 0:06 /usr/bin/gnome-shell