Engines can turn faster than 3000rpm, even in the general case. Car engines are 4 strokes, so you're probably interested in collecting data and issuing control

Engines can turn faster than 3000rpm, even in the general case. Car engines are 4 strokes, so you're probably interested in collecting data and issuing control signals through those 4 strokes. I believe my small car redlines at 7,000rpm, so that leaves roughly 2ms per stroke (for all 4 cylinders). Also, the ECU does more than just the cylinder values, it's monitoring other systems as well, such as the transmission, traction control, &c which also have hard deadlines. I don't think there is enough time to garbage collect, and as other gave stated, there should be little to no need to allocate in this type of code anyway.