AOT vs JIT Compilation in Ivy: Benchmarks & Trade-offs

Abstract

Angular's Ivy rendering engine is a major change of the framework's compilation and rendering paradigm. Essentially, it changes the way the older View Engine works by replacing it with a more efficient, instruction-based architecture that allows locality-aware compilation, better tree shaking, and smaller, more predictable output. In this case, comparing AOT with JIT is very important for understanding how Ivy affects developer experience and production performance. This article compares AOT and JIT to real-world scenarios through benchmarks, which shows that bundle size, build time, startup latency, and runtime are some of the metrics that can be measured. The results indicate that Ivy-powered AOT is always better because it provides smaller bundles and faster load times, thus production deployment is the most favorable scenario. On the other hand, JIT retains its position during development because of fast rebuild cycles and template compilation on-the-fly, however, at the cost of increased runtime. The research breaks down Angular Ivy innovations in architecture to give a clear understanding of the results, showing how the compilation locality and tree-shakable instructions affect the performance trade-offs in different environments. The contributions embody a thorough empirical comparison of AOT and JIT under Angular Ivy, architectural analysis of internal mechanisms leading to differences in performance observable, recommendations for deployment of the engineering teams, and investigation of next steps like better incremental builds and hybrid compilation workflows all aimed at helping determine the best compilation strategy for modern Angular ​‍​‌‍​‍‌applications.