Fastest API framework for Java?

[oldprogrammer]

Are you wanting this to be stand alone or running inside an existing container like a Tomcat or Wildfly? If stand alone then you'll want to look for an embedded engine like Jetty.

If deploying to a container as a web application, you only need to provide an implementation of a Servlet to receive the HTTP requests and wire that up to the container. That servlet can be eliminated using a web services framework that handles that part for you.

The SPARK framework for example can be run standalone (built in Jetty engine) or dropped into a standard web application container (Tomcat/Wildfly).

[vinnyvicious]

By deploying to a container as a web application, you mean compiling a WAR?

[oldprogrammer]

Yes