[groovico]

The advanced instant product search needs to request data with every key press. It only consumes resources when it's being used.

The speed of it is purely down to the server you are on and the resources available to your site.

You have to take into consideration what it's doing, as a person is tying it's literally searching in realtime on the site for all the products which match what the customer is doing.

On your normal x-cart sites (say 30 customers or less online at any one time) it generally works no problems at all unless you don't have the resources for it.

If you have a site which gets 30 or more conncurrent (on at the same time) users I wouldn't recommend it unless you are on a dedicated server.