Ethereum co-founder Vitalik Buterin has called for developers in the zero-knowledge proof (ZK) and fully homomorphic encryption (FHE) sectors to adopt a new metric for evaluating performance. Buterin suggests that performance should be measured by the ratio of encrypted computation time to original computation time, rather than the traditional metric of operations per second. This approach aims to provide a clearer understanding of the computational overhead involved in these cryptographic processes.