Vitalik published an article titled Epochs and slots all the way down: ways to give Ethereum users faster transaction confirmation times. Currently, Ethereum's Gasper consensus mechanism uses a slot-and-epoch architecture, but this mechanism is complex and the finality confirmation time is too long (12.8 minutes). SSF uses a mechanism similar to Tendermint to terminate the block before the next block is generated, while retaining the "inactive leakage" mechanism to ensure the stable operation and recovery capability.