Re: Shrinking GTK for PDA usage

[Sven Neumann <sven gimp org>]

Hi,

Michael Taht <mtaht mvista com> writes:

> >From our arm_sa_le distro:
>         
> X11R6/lib
> 
> 78200 May 23  2002 libICE.so.6.3     
> 31672 May 23  2002 libSM.so.6.0 
> 702096 May 23  2002 libX11.so.6.2          
> 56744 May 23  2002 libXext.so.6.4         
> 94120 May 23  2002 libXft.so.1.1       
> 54336 May 23  2002 libXpm.so.4.11                
> 7896 May 23  2002 libXrandr.so.1.0     
> 18000 May 23  2002 libXrender.so.1.1  
> 18532 May 30  2002 libXtst.so.6.1         
> 42904 May 23  2002 libxrx.so.6.3 
> 
> 1104500 TOTAL (or, 1078k) for X11 libs
> 
> 1018576 libgtk-1.2.so.0.9.1                     
> 188664  libgdk-1.2.so.0.9.1
> 150912  gtk/themes/engines/libxeno.so.0.8
> 
> 1358152 TOTAL (or 1326k) for X11 based gtk/gdk libs
> 
> 738380 Xipaq
>  27224 blurt
> 254492 dillo
>  41140 matchbox
>   4940 mbcontrol
>  13660 miniapm
>  11612 minisys
>   7848 minitime 
>  10612 minivol 
>   7980 miniwave
>   8792 monolaunch   
>  11615 xkbd 
>  10002 xrandr                                                
>  21004 xset                                          
> 
> 1169301 TOTAL (1141k)
> 
> You wouldn't be measuring properly if you didn't count glib 1.2, too,
> so:
> 
> 174604 libglib.so
>   8916 libgmodule.so
>   7964 libgthread.so
> 191484 TOTAL (or, 186k)
> 
> Total size of a PDA sized GTK+/X11 distro - with a useful window
> manager, virtual keyboard, web browser and tools - without fonts: 
> 
> 3731k
> 
> As I wrote before, fonts are a bigger part of the size problem than the
> libraries themselves - truetype fonts, in particular, are huge. And the
> rest of the Linux OS overhead ain't too shabby either, in my case, over
> 5x the size of the graphics core. 
> 
> Got numbers for a directFB one, on arm? (glib 2.0/gtk 2.0/pango/atk/etc)

I should have at least given you some numbers. Sorry, I don't have any
at hand for the ARM platform, but here are some for ix86 measured a few
months ago:

libgtk-directfb-2.0.so.0   2163k
libgdk-directfb-2.0.so.0    307k
libatk-1.0.so.0              82k
libgdk_pixbuf-2.0.so.0       71k
libpangoft2-1.0.so.0        176k
libpango-1.0.so.0           189k
libgobject-2.0.so.0         216k
libgmodule-2.0.so.0          10k
libglib-2.0.so.0            396k
libdirectfb-0.9.so.10       148k
libfreetype.so.6            246k
libpng.so.2                 174k
libz.so.1                    55k
                           -----
                           4233k

This is a full-featured GTK+-2.0 setup. We have been able to strip
GTK+ down to below 1MB by removing lots of widgets we don't need. Of
course this is very application-dependant:

libgtk-directfb-2.0.so.0    962k
                           -----
                           3032k
                           

the dependency on libatk can easily be dropped and the size of
freetype may also be reduced by removing unneeded font drivers so it
should definitely be possible to get a useful GTK+-2.0 setup below
3MB. Of course we have omitted the kernel, the base system as well as
libc in this calculation.

Using dietlibc, we have also created a statically linked GTK+-2.0
application that has _no_ additional dependencies and weights in under
2MB. Oh well, perhaps I should sit down and prepare the slides from
our talk at Guadec3 for the web.


Salut, Sven