Citation:

Indrajit Shanbhag, Rutul Desai, 2025. "Optimizing IOS App Performance Using SwiftUI and Combine: A Comparative Study of MVVM vs. VIPER Architectures", ESP Journal of Engineering & Technology Advancements  5(3): 84-90.

Abstract:

An in-depth empirical study comparing the two architectural paradigms MVVM and VIPER within the scope of modern iOS development with SwiftUI and Combine is presented here. It therefore puts an emphasis on software quality attributes — i.e., performance (render time, memory consumption, CPU productivity), scalability, and maintainability of the code — during migration of legacy applications built on top of UIKit to an architecture based on SwiftUI and Combine. Two real-world iOS applications of varying complexity were partially re-engineered under both architectures to compare practical results. Xcode Instruments provided the basis for collecting all performance metrics, while scalability and maintainability were rated through cyclomatic complexity, modularity, test coverage, and development overhead. Results show that even though MVVM enables fast development and runs well on small to medium-sized applications, scalability issues plus increased maintenance costs when applied to larger systems due to ViewModel bloat have been observed. On the other hand, even though VIPER comes with initial verbosity, it brings better modularity, concern separation, clarity, and matches enterprise-grade requirements more effectively in high-load or multi-team environments. This study presents numerical marks and hands-on design tips, setting up a choice plan for iOS groups using SwiftUI in their updates. The findings hold great meaning for tech leads, app designers, and firms wanting a setup that allows apps to grow and be kept for use in setups where speed matters.

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Keywords:

Swiftui, Uikit, MVVM, VIPER, IOS Development, Declarative UI, Architectural Patterns, Combine Framework, Performance Optimization, Modular Architecture, State Management, Code Maintainability, Hybrid App Development, Empirical Software Research, Architectural Migration, Business Logic Reusability.