[nycphp-talk] So why is Ajax so fast?
enolists at gmail.com
Fri Jan 12 12:50:27 EST 2007
It definitely depends on how you're utilizing Ajax methods.
On the client side, a page load including headers, tags, external files,
process for the browser as well as the network (firebug gives a good glimpse
of all of this). If you're just loading a piece of data, say a JSON array
of the options in a select box, or a JSON array of information to create a
couple local form fields with, you're skipping LOTS of overhead and merely
replacing a small portion of an already built page.
As for the server side, for a full page load, you might find yourself
hitting the database 5 or 10 times. Maybe even 150 times. You're also
running includes/requires, template engine, likely an entire framework full
of tweaks, specialized queries and automation to build the page from data to
template to html. Asking the server for a list of states in JSON format
should be far less a production. Of course, the difference may be in a few
ms, but on a heavily trafficked site, few ms can be a lifetime.
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