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

[Mark <markg85 gmail com>]

On Thu, Oct 1, 2009 at 4:31 PM, Ross Burton <ross burtonini com> wrote:
> On Thu, 2009-10-01 at 16:00 +0200, Petr Tomasek wrote:
>> On Wed, Sep 30, 2009 at 05:51:56PM +0100, Ross Burton wrote:
>> > On Wed, 2009-09-30 at 12:32 -0400, David Zeuthen wrote:
>> > > (Btw, this infrastructure is not specific to the gphoto2:// GVfs
>> > > backend; any GVfs backend can use it - say, a Flickr backend).
>> >
>> > Bad example, downloading the original file (no seeking in HTTP) just to
>>
>> HTTP_RANGE?
>
> Thanks to latency I imagine it would actually be faster to download the
> entire image than attempt to "seek" around a file over HTTP.
>
> Ross
> --
> Ross Burton                                 mail: ross burtonini com
>                                          jabber: ross burtonini com
>                                           www: http://burtonini.com

I made a nice image of my last benchmark:
http://img36.imageshack.us/i/scalingperformance.png/

The one with just 21 seconds is where all my images are in cache.
That's also where all my cores are working at 100%
The other thread benchmark (70 seconds) vauses all cores to work at ~40%