Re: Speeding up thumbnail generation (like multi threaded). Thoughts please.

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

On 08/31/2009 09:03 AM, jcupitt gmail com wrote:
> > > a very quick load-at-1/8th-size read where it just decompresses enough
> > > to be able to get the DC component of each 8x8 block. If you use
> > > libjpeg like this you can expect around a 100x speedup of the
> > > decompress step.
> >
> > The gdk-pixbuf jpeg loader does this already.
>
> That's good, but I wonder if this feature is being used? I tried this
> tiny program:

I believe this is where it happens:

http://git.gnome.org/cgit/gtk+/tree/gdk-pixbuf/io-jpeg.c#n924


- Mike