I’ve redone the measurements making sure the systems are lossless.
1st system is based on steam power, axles, gearboxes, and a rotational engine, so there should be no losses.
2nd system: batbox->engine->crusher
3rd system: 2x(batbox->motor)->gearbox->axle->transformer gearbox->axle->rotational engine->2xcrusher
I also checked RU/t with a meter on the axle just before the rotational engine in systems 1 and 3 (64 and 128 respectively). System 2 works at 64 KU/t.
Measurements are performed via stopwatch.
1st system: 26 s + 5 s
2nd system: 13 s + 10 s
3rd system: 13 s + ~5 s
I noticed that after the first duration (animation) crushed coal starts to appear in the output. After all 4 stacks of 4 crushed coal appear (2nd duration), the crusher continues with the next recipe.
My computer is fast enough; I’m also running the server on a separate computer.