Re: Speeding Up libglade

[Andreas Volz <lists brachttal net>]

Am Sun, 05 Apr 2009 16:03:54 +0200 schrieb arne:

> Hello,
>
> I want to run my application on a Embedded System with a weak CPU.
>
> Compared to another program which I build earlier with Glade2 the
> start time of my actual application is appreciable slower.
>
> I read the Article
> http://syslog.movial.fi/uploads/compiled-libglade.pdf. Does anyone
> know where can I get this build of libglade or if there exist a patch?
>
> Is there another way to speed up libglade?

Maybe you could try to link your glade XML file into your application.
I've done it with this script:

http://pastebin.com/f677a2f2

And run it with:

$ perl bin2hex.pl myfile.glade 1 my_glade_data > myglade.h

and then this code:

#ifdef GLADE_HEADER_COMPILE
#include "myglade.h" // this is created with bin2hex.pl
#else
#define GLADE_FILE "myfile.glade"
#endif

Glib::RefPtr<Gnome::Glade::Xml> createGlade (const Glib::ustring &root,
                                             const Glib::ustring &domain)
{
#ifdef GLADE_HEADER_COMPILE
  return Gnome::Glade::Xml::create_from_buffer(
         my_glade_data, my_glade_data_size,
         root, domain);
#else
  return Gnome::Glade::Xml::create(
         searchGladeFile (GLADE_FILE), root, domain);
#endif
}

const std::string searchGladeFile (const std::string &glade_file)
{
  vector <string> name_vector;

  name_vector.push_back (glade_file);
  name_vector.push_back ("../" + glade_file);
  name_vector.push_back ("src/" + glade_file);
  // TODO: src dir variable...
  name_vector.push_back (string (PACKAGE_DATA_DIR) + "/glade/" + glade_file);

  return searchFile (name_vector);
}

const std::string searchFile (std::vector <std::string> &name_vector)
{
  struct stat buf;

  for (unsigned int i = 0; i < name_vector.size (); i++)
  {
    string &try_name = name_vector[i];

    bool found = !(stat (try_name.c_str (), &buf));

    if (found)
    {
      return try_name;
    }
  }

  return "";
}

I used it to hide a glade XML in a commercial application, but maybe you
could save loading time on your embedded hardware.

regards
Andreas