Just managed to get a speed of 1.94 Pieces Per Second completing a 20 line sprint in JStris! Not totally clean, but it's a blazing speed for me at least.

Replay file here: https://jstris.jezevec10.com/replay/94142076

Yes! Finally got a sub 30 second 18 line Cheese race in Jstris today!

Replay: https://jstris.jezevec10.com/replay/93066605