[sugar] simple hacks to improve the performance of the Sugar UI

[Erik Garrison]

Per C. Scott's suggestion, I have created trac tickets for each of the
first three items.  A very old ticket exists for the 4th.

On Fri, Oct 17, 2008 at 03:56:05PM -0400, Erik Garrison wrote:
> ...
> 
> There are several 'hacks' included in this bundle:
> 
>  1) optionally disable frame appearance on activity switching, if the
> file /home/olpc/no-frame-on-tabbing exists
 
http://dev.laptop.org/ticket/8852

>  2) optionally disable autosaving on activity switching, if the file
> /home/olpc/no-auto-save exists
 
http://dev.laptop.org/ticket/8853

>  3) optionally start the X composite manager (xcompmgr) on sugar startup
> to prevent the redraw of activity windows when switching from one
> activity to the other (if /home/olpc/use-xcompmgr exists).

http://dev.laptop.org/ticket/8854

>  4) compcache, http://code.google.com/p/compcache/, which makes a
> compressed block device usable for swap out of a chunk of RAM.  By
> compressing unused pages this system may offset memory usage increases
> incurred by using composite.
 
http://dev.laptop.org/ticket/28

an old one!

Erik