Yeah, I also work on systems where we care about microsecond latency (market data handling). In most cases, we still leave the exception handling in. It's maybe

Yeah, I also work on systems where we care about microsecond latency (market data handling). In most cases, we still leave the exception handling in. It's maybe a few cycles of cost and we definitely need the whole system to stop if any of those exceptions come up. Then again, the costs are minimal b/c our conditional to check for an exception is easy to predict (simple comparison to a stack variable probably on the register already). In a hard realtime system you really have to move all the exception handling upstream and use error codes downstream. Problem is this does hurt performance in the average case.