Can pulsar users here talk about exactly once message delivery from the consumer side? I use Kafka and needed a cache based on incoming events. But if the consu

Can pulsar users here talk about exactly once message delivery from the consumer side? I use Kafka and needed a cache based on incoming events. But if the consumer crashes it's not easy to pick up from exactly where it left off without manually committing offsets which hurts performance. There's also some hand waving Kafka gossip that it's hard to commit offsets right. Any insight here is greatly appreciated.