[xmonad] xmonad and launcher prompt memory

Carlos López Camey c.lopez at kmels.net
Wed Sep 19 14:43:52 CEST 2012

Hello Carsten,

After I started the launcher prompt and did some queries, the resident
memory shown in `top` went from 5620 bytes in a restarted xmonad to
6440 bytes. After doing more queries it stopped at 7280 bytes.

I observed the same behavior with the shell prompt (Prompt.Shell), but
I am not sure if it is due to the new patch. Could someone that
doesn't have the patch applied that a look?

If the new patch is the reason, the guilty data type might be
XPOperationMode in XPState:

> data XPOperationMode = XPSingleMode ComplFunction XPType | XPMultipleModes (W.Stack XPType)


> data XPType = forall p . XPrompt p => XPT p
> type ComplFunction = String -> IO [String]

I am not sure what should I do to get the XPState garbage collected
when a window prompt is destroyed. Help?


2012/9/19 Carsten Mattner <carstenmattner at gmail.com>:
> 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?

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