Re: Nautilus thumbnail creation SLOW. gThumb does a much faster job.

["Dr. Michael J. Chudobiak" <mjc avtechpulse com>]

Mark wrote:
> Hey,
>
> i just opened up some directory`s with thousands of images and i saw 
> that nautilus is horrible slow.
> gThumb on the other hand seems to be extremely fast.
>
> so.. isn`t it time to revise the thumbnail creation?
>
> i mean.. nautilus seems to use imagemagick now to create the thumbnails 
> and that might be a little overkill to just generate thumbnails. 
> imagemagick can be used for so much more and all that stuff is (in this 
> case) a waste of cpu cycles.
> I do wonder how gThumb does this but it looks like they are just using 
> gdk-pixbuf url: http://developer.gnome.org/doc/API/gdk-pixbuf/
> so.. please CONSIDER rebuilding the thumbnail generation part!! it will 
> go alot faster.


What type of images? gThumb has its own code to generate jpeg 
thumbnails. If you look at svn trunk:

libgthumb/file-utils.c:gth_pixbuf_animation_new_from_uri

calls

libgthumb/jpeg-utils.c:f_load_scaled_jpeg

to load jpeg thumbnails (if no cached thumbnails exist). It does not use 
gdk_pixbuf loaders in that situation.

- Mike