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I am working on a web application in Java which gets data from servlets via AJAX calls.
This application features several page elements which get new data from the server at fairly rapid intervals.
With a lot of users, the demand on the server has a potential to get fairly high, so I am curious:
Which approach offers the best performance:
Many servlets (one for each type of data request)?
Or:
a single servlet that can handle all of the requests?
There is no performance reason to have more than one servlet. In a web application, only a single instance of a servlet class is instantitated, no matter how many requests. Requests are not serialized, they are handled concurrently, hence the need for your servlet to be thread safe.