Ritta Narita interned at The University of Tokyo researching physics simulation. For two intern projects, she developed an original virtual machine for random forests in hivemall and implemented a socket manager with ServerEngine for fluentd's new multiprocess model. For hivemall, the virtual machine was 10 times faster than JavaScript and restricted code execution. For fluentd, the socket manager allows workers to share a listening socket and fully utilize multicore processors without additional configuration.