41828Re: Parallel Downloads
- Dec 2, 2008Hi Eric.
Thanks for your answer.
I am trying to read all the wisdom but sometimes it is more specific
why I ask here for help :-)
Loading form Yahoo's server is faster. That is good to know and
exactly the opposite of what I thought. I do believe these servers are
faster but in that amount huhh ;)
In the same way I am impressed that loading my images from a subdomain
But I don't understand the cookie-thing. Why are a cookies sent on a
image request? And, do the cookies form Google Analytics (on Google's
server) count as well?
Thanks again for these insights!
> We've collected all our wisdom on this on
> . There is no exact answer to your question...but the performance
> rules we've distilled provide you the framework we use in making these
> It is almost always going to be true that serving YUI files combo-
> handled from Yahoo's servers or individually from Google's servers
> will be faster than serving them from your servers, although JS files,
> regardless of their domain, do block. But Google and Yahoo have
> extensive server infrastructures with edge hosting throughout the
> world. It's unlikely that your own hosting provider can match the
> performance of these high end systems.
> One of the reasons to load images from a separate domain is that your
> images.example.com subdomain is probably uncookied; whereas your
> user's cookies are being transmitted with every image request on your
> main domain, they are not transmitted to a subdomain if you've set
> them up correctly. Also, the 2x2 rule in older browsers is addressed
> by using this approach.
> On Nov 29, 2008, at 12:47 PM, dev.sebastian wrote:
> > Hi
> > I came across this post
> > http://yuiblog.com/blog/2007/04/11/performance-research-part-4/
> > and I am not sure if I am right.
> > If I would load some parts of my site - like my images - from another
> > domain, I can increase parallel downloads and so the time for all
> > downloads falls?
> > Lets say I will load my images not like "/images/file.png" but like
> > "http://images.example.com/file.png". Is it faster?
> > Isn't the time looking which server/IP the domain has more
> > "expensive"?
> > In this case: I though it is faster to load the YUI! files from my
> > server. But maybe it is faster to load it from Yahoo's server because
> > the browser can download two css files and my scripts (from my server)
> > parallel?
> > suntrop
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