Compare to: Domain Sharding - Two Domains
Browsers open a limited number of connections per domain. Most notably, Internet Explorer 6 and 7 open only two connections per domain.
This page contains 22 images served from one domain: l.yimg.com.
With so many resources served from one domain, the page loads slowly.
Splitting, or sharding, the images across two domains results in a faster page, especially in IE 6 & 7.
22 images served from one domain:
This is the companion website for Even Faster Web Sites by Steve Souders.