How Angular 8 has enhanced the performance over its previous versions?

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Angular 8 consists of advanced level features such as differential loading, CLI workflow improvements, Dynamic imports for lazy routes, Ivy rendering engine, Bazel, etc. which ensure systematic workflow and performance improvements.

Angular 8 introduced several performance enhancements over its previous versions. Here are some key improvements:

  1. Ivy Renderer: Angular 8 introduced the Ivy Renderer as an opt-in preview. Ivy is a new rendering engine that offers better performance, smaller bundle sizes, improved debugging, and enhanced flexibility compared to the previous View Engine. Ivy achieves this by generating more efficient code and optimizing the rendering process.
  2. Bundle Size Reduction: With Angular 8, the size of generated bundles is reduced, resulting in faster loading times for applications. This reduction is achieved through various optimizations, including differential loading, which serves different bundles to modern and legacy browsers, and improved tree-shaking capabilities to eliminate unused code.
  3. Improved Compilation Speed: Ivy brings significant improvements to compilation times, making the development process faster and more efficient. The incremental compilation feature allows Angular to recompile only the parts of the application that have changed, resulting in faster build times, especially in large projects.
  4. Lazy Loading Routing Modules: Angular 8 provides improved support for lazy loading routing modules, allowing applications to load modules and components dynamically as needed. This optimization reduces the initial loading time of the application by loading only essential modules upfront and deferring the loading of less critical components until they are required.
  5. Optimized Angular CLI: Angular CLI, the command-line interface for Angular, received several optimizations in Angular 8, leading to faster project scaffolding, building, and testing. These improvements contribute to a smoother development experience and shorter iteration cycles.
  6. Improved Angular Material: Angular Material, the official UI component library for Angular, received updates in Angular 8 to improve performance and efficiency. These updates include optimizations to reduce bundle size and improve rendering performance, resulting in faster UI interactions and smoother user experiences.
  7. Enhanced Change Detection: Angular 8 introduced optimizations to the change detection mechanism, resulting in faster rendering and improved application performance. These optimizations reduce unnecessary checks and improve the efficiency of change detection in components, especially in scenarios with large data sets or complex UIs.

Overall, Angular 8 focuses on enhancing performance across various aspects of application development, including rendering, bundle size, compilation speed, routing, CLI, and change detection, making it a significant improvement over previous versions.