Blockchain has been one of the most attractive technologies for many modern and even future applications. Fabric, an open-source framework to implement the permissioned enterprise-grade blockchain, is getting increasing attention from innovators. The latency performance is crucial to the Fabric blockchain in assessing its effectiveness. Many empirical studies were conducted to analyze this performance based on different hardware platforms. These experimental results are not comparable as they are highly dependent on the underlying networks. Moreover, theoretical analysis on the latency of Fabric blockchain still receives much less attention. This paper provides a novel theoretical model to calculate the transaction latency under various network configurations such as block size, block interval, etc. Subsequently, we validate the proposed latency model with experiments, and the results show that the difference between analytical and experimental results is as low as $6.1\%$. We also identify some performance bottlenecks and give insights from the developer’s perspective.

区块链已成为许多现代甚至未来应用程序中最具吸引力的技术之一。Fabric是实现许可的企业级区块链的开源框架，正在受到创新者的越来越多的关注。延迟性能对于评估Fabric链的有效性至关重要。进行了许多实证研究，以基于不同的硬件平台分析此性能。这些实验结果不可比，因为它们高度依赖于基础网络。此外，关于Fabric区块链延迟的理论分析仍然很少受到关注。本文提供了一种新颖的理论模型来计算各种网络配置（例如块大小，块间隔等）下的事务延迟。随后，$6.1％$。我们还将找出一些性能瓶颈，并从开发人员的角度给出见解。