[PATCH] xkb: Check and load precompiled .xkm during startup if available

[Peter Hutterer]

On Tue, Mar 16, 2010 at 12:04:53PM +0600, Mikhail Gusarov wrote:
> 
> Twas brillig at 10:12:14 16.03.2010 UTC+10 when peter.hutterer at who-t.net did gyre and gimble:
> 
>  >> New 'precompiled' subdir is added to xkb data dir, allowing to
>  >> pre-compile keymaps to be loaded when server starts and hence avoid
>  >> running xkbcomp, saving a bit of time.
> 
>  PH> Good idea. Do you have any numbers on how much time this actually
>  PH> saves?
> 
> I can't measure it -- see below.
> 
>  PH> IIRC we only run xkbcomp once at the moment and then re-used the
>  PH> cached values.  Is skipping this one run beneficial?
> 
> Not for my case, I don't have xkbcomp at all, as it needs Xlib (which I
> managed to avoid entirely so far).
> 
>  PH> What happens if xkeyboard-config is updated after an xkm has been
>  PH> precompiled? Do the users need to recompile? This is my main worry,
>  PH> it'll make triaging of nonworking keyboard layouts quite tricky.
> 
> Yes. Probably this need to be handled, so it was more RFC actually, than
> actual patch.

Could you just replace xkbcomp with a shell script that copies the xkm files
into the right directory?

Cheers,
  Peter