  Lower computer system input-to-output latency substantially reduces many task
completion times. In fact, literature shows that reduction in targeting task
completion time from decreased latency often exceeds the decrease in latency
alone. However, for aiming in first person shooter (FPS) games, some prior work
has demonstrated diminishing returns below 40 ms of local input-to-output
computer system latency. In this paper, we review this prior art and provide an
additional case study with data demonstrating the importance of local system
latency improvement, even at latency values below 20 ms. Though other factors
may determine victory in a particular esports challenge, ensuring balanced
local computer latency among competitors is essential to fair competition.
