Empirically comparing the performance of blockchain's consensus algorithms

Blockchain-based audit systems suffer from low scalability and high message complexity. The root cause of these shortcomings is the use “Practical Byzantine Fault Tolerance” (PBFT) consensus protocol in those systems. Alternatives to PBFT have not been used blockchain-based due limited knowledge about their functional operational requirements. Currently, no blockchain testbed supports execution benchmarking different protocols a unified testing environment. This paper demonstrates building that five state-of-the-art system; namely PBFT, Proof-of-Work (PoW), Proof-of-Stake (PoS), Proof-of-Elapsed Time (PoET), Clique. Performance evaluation algorithms carried out using data real-world system. These results show Clique best suited for systems, based on features.