A compute server receives a first request from a client device that triggers execution of a first third-party code piece. The first request is directed to a first zone. A single process at the compute server executes the first third-party code piece. As a result of executing the first third-party code piece, a second request is generated that triggers execution of a second third-party code piece. The second request is directed to a second zone. The single process executes the second third-party code piece. A response is generated to the first request based at least in part on the executed first third-party code piece and the executed second third-party code piece. The generated response is transmitted to the client device.