To maintain the performance of web application ,as per my perspective. Divide JavaScript into small parts and only load components or pictures when needed. To increase the effectiveness of data retrieval, optimize database queries and make advantage of indexing. To identify and address breakdowns or errors, continuously assess performance and collect user input. To increase perceived performance, use asynchronous loading for features that are not necessary at all.

To maintain speed while adding features to a web app, optimize code and assets by minimizing CSS, JavaScript, and images. Implement lazy loading for resources, and leverage caching to reduce load times. Use a Content Delivery Network (CDN) for faster content distribution. Regularly assess performance with tools like Google Lighthouse and make iterative improvements. Employ scalable backend solutions and ensure efficient database queries to handle increased load effectively.

To maintain the web app performance, I will focus on the areas mentioned below: Code Optimization: Try to Keep the code clean and efficient, minimizing redundant operations and use of best performance based technology. Caching: Use caching for frequently accessed data to reduce server load. Lazy Loading: Load content as needed to improve initial load times like use of thumbnails for images. Database Indexing: Ensure queries are efficient by indexing frequently searched fields. Apart from this, their could be some other strategies but for initial perofrmance modifications, these practices can be utilized.

- Isolate new feature by implementing micro-services or modular design architecture - Implement best practices such as but not limited to - Lazy loading - Caching - Asset optimisation like minifying CSS, compressing images - Reduce backend calls by pooling, query profiling - Thorough performance tests - Utilise cloud computing which helps in faster scalability - CDCI implementation to reduce downtime during deployment/rollbacks

Basic ones like code optimization and scalable hardware, utilize gzip compression, minification of assets, lazy loading if your application is image heavy. To improve further, most web apps are CRUD operations with heavy UI. invest in efficient and advanced data structures. like, red black tree and hashed document storages. Redis or similar caching solutions if the data is not changing. Explore distributed computation with eventual integrity architecture to offload computational loads to various nodes. Twitter (X) is a great example of this architecture. Last but not least, if applicable utilize procedural generation instead of heavy assets. Example, Minecraft. It can run on a potato while still generating the largest worlds.