I'm working on an energy project. In my site there are may energy services are registered with there enrollment process through web services. Initially it was 1 to begin with now 3 more came to integrate.
On the very first page I've to show the plans based on the zip codes. Now on this page I've to request to all 4 energy provider to list the energy plans.
To request each service at a time in sequential way definitely it will take more time as I've to get the data from external source and this is the first page so I do not want to make it slow down at the first instance only.
How can I make request to all the services simultaneously and collect the data from each services and list it on the final page.