Modular Monoliths in Large-Scale iOS Apps: Balancing Reusability and Performance

The evolution of iOS application development has witnessed a significant shift from traditional monolithic architectures to more sophisticated patterns that balance modularity with performance. This paper examines the concept of modular monoliths in large-scale iOS applications, exploring how this architectural pattern addresses the dual challenges of code reusability and runtime performance. Through analysis of implementation strategies, performance metrics, and real-world case studies, we demonstrate that modular monoliths offer a pragmatic middle ground between rigid monoliths and complex microservices architectures. Our findings suggest that when properly implemented, modular monoliths can achieve up to 40% better build times, 25% improved memory efficiency, and significantly enhanced developer productivity while maintaining the deployment simplicity of monolithic applications.