Request Data from CRM to a website

I have a website(asp.Net) where users can log in and check out their own profile or the profile of other people.

Some data needs to be saved/calculated in CRM,  and then needs to be send to the website.

So the use-case should be, whenever I open the profile of any user, there should be a request send to CRM with the ProfileID, and CRM will calculate or send the data back to the website.

I know this will only work with an Action that takes a ProfileId, ill have to do my retrieve in this Action, maybe do some logic and send this data back. (Or are there any other ways ?)

But I dont know how can i trigger the request from the website, shall I open a connection in the website and then trigger this ?? (Would this be slow)?

Is there another way of achieving what i want to do?

How will the speed be of i will do lots of request to crm to get some data?