The Angular team has amazed the entire software fraternity by releasing updated versions at frequent intervals! This is indeed a dynamic move to eliminate the road-blocks encountered by Angular app developers, leverage the goodies of emerging technologies and, provide a rich UX to customers. Angular has as many as 10 enhanced versions to its credit! Amongst these, Angular9 is one of the versions that offer multifarious breaking changes. Out of all these enhancements, the new Ivy Compiler in Angular’s V9 has stolen the show. Angular9 Ivy comes with unbeatable features that promise to make your app smaller and swifter.  This article talks about the advantages of the Ivy Compiler of Angular9 and its crucial role in Angular app Development.

Ivy Compiler of V9 in a nutshell

Ivy refers to Angular’s future-generation compiling and rendering pipeline. With the introduction of Angular9 Ivy, now the newer version of the compiler and the runtime instructions are employed by default in place of the older one called View engine.  This Ivy Compiler comes with numerous advantages for an Angular app Development Company.

Top Advantages of the Ivy Compiler in Angular9

Given below are the key advantages of the Ivy Compiler in Angular’s V9.

Default AOT Compilation: Quicker build times

In Angular’s previous versions, the developers preferred JIT compiler as the AOT compiler used to be very slow. However, the scenario has changed with the advent of Angular9 Ivy that enables the Ahead of Time (AOT) Compiler by default. The novel architecture of Ivy has worked wonders in improving the performance of the AOT Compiler. A compiler’s performance is measured based on the app’s overhead on the top of a plain TypeScript Compilation. Owing to Ivy, Angular’s AOT Compiler now performs approximately 40% better than it did earlier; as the overhead has reduced to 0.5X from 0.8X in the Angular documentation app. Thereby, the build times became quicker, proving to be a sigh of relief for the Angular app developers.

Reduction of bundle size

Unlike the earlier compiler View Engine, Ivy employs the tree-shaking technique to get rid of the unused code from applications. This leads to lesser code generation for each of the Angular components, thereby reducing the bundle size. Reduction in bundle sizes improves the app’s performance and proves beneficial to large applications having numerous components, as well as small applications that do not use too many Angular features.

Lazy Loading

Ivy enables the lazy loading of any component. Thereafter, these components are dynamically rendered without the need for routing or an Angular module. Also, the libraries used by the lazy-loaded components are bundled to form lazy-loaded chunks.

Better manipulation of styles

Ivy has simplified style-handling and merges them predictably. Earlier the bindings were dependant on the last evaluation and the timing when a change was made to these expressions. Now, there is a clear and consistent order denoting specific styles as per their precedence, instead of timing.

Multiple language support via a single app bundle

Owing to Ivy, the app can support various languages using a single app bundle with one hostname. Some additional set-up may be required though.

Easier debugging

The introduction of Ivy has ushered in more tools for debugging apps. To cite an example, the new “ng” object is available for debugging which enables the developers to obtain access to the directives, components, etc.

Speedy Testing

Thanks to Ivy, the application-testing speed has gone up by 40% to 50%. The reason is a revamped “TestBed” has been implemented which recompiles components used between test- cycles only if that component was manually overridden.

Added provider scopes

The new provider scopes “any” and “platform” have been introduced by the Ivy version of Angular. Provider scope “any” shares a provider for each module injector while “platform” scope can be shared across different Angular apps for the same document.

Better Internationalization

Internationalization refers to Angular’s existing feature which allows you to architect highly optimized apps as per the location. In Ivy, The quicker build-times are quicker due to pushing of build time substitutions later in the process, which makes this feature work much faster than before.

Better Type Checking

The Ivy Compiler is capable of checking more types of an application and applying more strict rules. Apart from the default type checks, there are some additional ones too. For instance, activating the flag “fullTemplateTypeCheck” signals the compiler to check all the aspects within the template, and activating the flag “strictTemplates” makes the compiler apply the strictest Type System rules available for type-checking. This functionality enables detecting bugs in the earlier stages of the developmental cycle itself.

Stronger Safety

In comparison to the erstwhile View Engine, Ivy is far more efficient in offering more safety. Furthermore, error messages become easier to read using Ivy.

Final Verdict

Thus, the Ivy Compiler in Angular’sV9, not only makes the Angular apps smaller, simpler and swifter but also gifts the Angular framework with a plethora of advantages. No wonder it is considered to be one of the most disruptive add-ons. Therefore, adopting this novel feature will indeed be a strategic move for any enterprise.

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