[xmonad] xmonad and launcher prompt memory

Carlos, I'm wondering whether using the launcher prompt may be the reason for xmonad starting at 4 to 5 megs freshly and climbing to around 7 megs. I didn't try without the launcher promot and don't really complain but am curious whether there's some caching and possible space leak in either the launcher prompt or xmonad core or one of the popular action hooks. Gwern, this is not an objection to merging, just an observation. This is on ghc-7.6.1-i386. Any comments?