Sebastian Korfmann <korfmann.sebast...@gmail.com> wrote:
>
>
> I've been wondering if the assumption of four asset hosts for the sake of
> speed improvements is still valid.
>

And Jeremy Kemper <jeremykem...@gmail.com> wrote:

> Domain sharding is still useful but our guidance is outdated. It's
> from a pre-SSL-everywhere, pre-SPDY era where browsers had low
> per-domain connection caps.


The other thing to consider is that the connection overhead is much, much
higher for mobile. If you have a responsive site and/or a high proportion
of mobile visitors performance may be much worse for these visitors when
using asset domains.

refs:
http://www.mobify.com/blog/domain-sharding-bad-news-mobile-performance/
http://chimera.labs.oreilly.com/books/1230000000545/ch08.html

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