Angular optimization:

Intro:

Improving the performance of an Angular application involves optimizing various aspects of the application, including rendering, network requests, and code execution. Here are some strategies and best practices to enhance the performance of your Angular application:

Lazy Loading:

Implement lazy loading for modules and components that are not immediately required. This approach improves the initial loading time by loading only the necessary parts of the application when needed.

Ahead-of-Time (AOT) Compilation:

Use AOT compilation instead of Just-in-Time (JIT) compilation to reduce the size of the application bundle and improve startup time. AOT compilation pre-compiles templates and eliminates unnecessary runtime compilation.

Production Build Optimization:

Enable production mode during the build process to apply various optimizations like tree shaking, minification, and dead code elimination. These optimizations significantly reduce the bundle size and improve loading speed.

Optimized Images and Assets:

Compress and optimize images, icons, and other assets to minimize their size without sacrificing quality. Consider using next-generation image formats like WebP, and utilize techniques such as lazy loading and progressive rendering for images.

Code Splitting:

Split your application into smaller chunks to load only the required code for a specific route or feature. This approach reduces the initial loading time and improves the perceived performance of your application.

Minimize Bundle Size:

Avoid unnecessary imports, remove unused dependencies, and analyze your bundle to identify and eliminate any unnecessary code or modules. Smaller bundle sizes lead to faster loading times.

Change Detection Optimization:

Use the OnPush change detection strategy for components wherever applicable. It reduces the number of components checked during change detection cycles by only triggering checks when input properties change or when explicitly marked for check.

Smart Rendering:

Optimize rendering by utilizing virtual scrolling, infinite scrolling, or pagination for large lists of data. This approach prevents rendering all items at once, improving the initial rendering and scrolling performance.

Efficient Network Requests:

Minimize the number of HTTP requests by combining and caching resources. Use server-side rendering (SSR) or Angular Universal for improved performance and SEO.

Unsubscribe from subscriptions:

Properly manage subscriptions, unsubscribe from observables when no longer needed, and release resources. Avoid memory leaks and unnecessary processing.

Optimized Templates:

Optimize your Angular templates by avoiding complex expressions, excessive bindings, or heavy computations. Use the async pipe for handling asynchronous data in templates.

Caching and Local Storage:

Utilize browser caching and local storage to store static assets, API responses, or other data that can be reused across sessions.

Performance Testing:

Regularly test and measure the performance of your application using tools like Lighthouse, PageSpeed Insights, or WebPagetest. This helps identify areas for improvement and track performance changes over time.

CDK and Angular Material:

Utilize the Angular Component Dev Kit (CDK) and Angular Material libraries for performance-optimized, pre-built components that follow Angular’s best practices.

Remember, improving performance is an ongoing process. Continuously monitor and optimize your application as it evolves to provide the best user experience.

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