Re: [gthumb-list] Extremely slow loading of thumbnails

[Paolo Bacchilega <paolo bacchilega libero it>]

Il 22/03/2012 13:07, Ibragimov Rinat ha scritto:
> Thu, 22 Mar 2012 11:05:04 +0100 от Paolo Bacchilega<paolo bacchilega libero it>:
> > I cannot reproduce the problem, can you post the last part of the
> > 'configure' output after the 'Configuration:' line?
>
> Sorry for putting in, but that's the problem I mentioned earlier, in the beginning of January.
> It arises when there are many images in one directory. My test with 20000 images in
> one directory reveals that most of cpu time spent inside libglib and libgobject. There is
> some big-big cycle which forces generation of same thumbnails again and again.
>
> callgrind shows millions of g_hash_table_lookup, g_type_check_instance_is_a, g_str_hash
> and others.
>
> I used the following script to generate those images:
> --cut
> <?php
>
>      $im = imagecreatetruecolor (200, 60);
>      $red = imagecolorallocate ($im, 0xff, 0, 0);
>      $black = imagecolorallocate ($im, 0, 0, 0);
>
>      for ($k = 0; $k<  20000; $k ++) {
>          $str = sprintf ("image-%06d.png", $k);
>          imagefilledrectangle ($im, 0, 0, 199, 59, $black);
>          imagestring ($im, 5, 20, 10, $str."!", $red);
>
>          imagepng ($im, $str);
>      }
>
>      imagedestroy ($im);
>
> --cut

I tried this script and I still cannot see any performance issue, can 
you post the full callgrind report?

- Paolo