A Performance and Applicability Assessment of Consensus Algorithms for Modern Blockchain Architectures

Abstract

This study presents a comprehensive comparative research of the significant blockchain consensus algorithms, such as Proof of Work, Proof of Stake, Delegated Proof of Stake, Practical Byzantine Fault Tolerance, Proof of Authority, and hybrid mechanisms, and the purpose of it is to assess the performance, safety and applicability of blockchain to the modern use of blockchain. The studies analyze the key metrics, including throughput, latency, resource consumption, finality behavior, and fault tolerance in various network conditions based on a quantitative, simulation-based methodology with the help of secondary datasets. The results indicate that there are high levels of performance differences among consensus algorithms, as permissioned and delegated algorithms show better efficiency, and low latency, whereas public mechanisms put more emphasis on decentralization, disregarding speed and energy efficiency. The paper identifies the trade-offs inherent to consensus design and points out that no one mechanism is optimal, instead it needs to be chosen based on applicationspecific factors to do with scalability, trust, security, and decentralization. These insights help gain better insight into the issue of consensus behavior and make future choices regarding building the blockchain system.