So here's a pure speed test. Go from the following position and request a game against Stockfish Level 1 in 15+0 ultrabullet. See how many seconds you can force Stockfish to lose! Just a side-note, but this game is 100% drawn, making it a pure test of speed.
lichess.org/editor/1k6/4p3/3pPp2/2pP1Pp1/1pP3Pp/pP5P/P3K3/8_w_-_-_0_1
lichess.org/editor/1k6/4p3/3pPp2/2pP1Pp1/1pP3Pp/pP5P/P3K3/8_w_-_-_0_1