Your client is frustrated with slow app speed. How can you meet their demands for immediate solutions?

It's important to consider aspects related to application performance and scaling during the design phase. For issues related to slow applicaion performance, it is very important to identify which layer the issue is occurring,followed by exact class/method causing the issue, utilize effective log strategy to provide Insights on exception, use performance profiling tools in lower environments, refactor code for optimized response time.

Absolutely, identifying the root causes of slow app performance is the critical first step in addressing the issue effectively. Here’s a detailed approach to identify and understand the issues: 1. Utilize Profiling Tools - Profiling Tools / Monitor Key Metrics 2. Identify Specific Bottlenecks - Data Retrieval / Processing / Rendering 3. Real-World Scenarios - Load Testing / Data-Intensive Operations 4. Analyze Performance Logs-Server Logs/ Client-Side Logs 5. Gather User Feedback-User Experience 6. Document Findings-Create a Performance Report 7. Prioritize Fixes-Critical Issues and Quick Wins 8. Collaborate with Team-Cross-Functional Collaboration 9. Test and Validate Fixes-Regression Testing 10. Monitor Continuously-Performance monitoring

Here are few recommendations for optimizing application code, 1. Refactor methods for better reuse by elimination of unused code and variables 2. Review and optimize code which contains recursive for loops 3. Use application and database profiling tools in lower environments for identification of bottlecks in the code 4. Review and optimize code contains REST API calls for retrieval of data from external systems 5. Create respective database indexes for quicker data access

Leverage caching to store frequently accessed data in the application, utilize content delivery network (CDN) for improving application performance, security by storing application content resources

Design application infrastructure for scale by design. Hosting application services on kubernetes helps to easily scale infrastructure. Leverage Infrastructure as a Code for creation of new application infrastructure on the cloud

Slow speed is often not just the application code itself but the overall infrastructure and technologies used. No doubt optimizing the code and doing caching will help improve the performance for a short time. However, for a long time relief to the slowness is to move the application to cloud in a containerized format so that it can be scaled effectively and rapidly based on demand.It is also recommended to move to a microservice based architecture with the latest technology so that it not only aligns with the security best practices but also is more robust and reliable.

Use Micro frontend based architecture pattern for building UI by having smaller and independent deployable units. Micro frontend based approach provides better maintainability, reuse and scalability. Consider using Lazy loading for enhancing user experience, quicker load of application pages.