Your web app is at risk of performance issues. How do you ensure new features won't cause harm?

To ensure that new features added to your web app do not cause performance issues we can implement performance testing as a part of development process that involves load testing where multiple users accessing your application simultaneously to gauge how it handles concurrent usage. Code review is also a important process, ensure that new features are implemented efficiently and do not introduce unnecessary performance bottlenecks. Pay attention to algorithms, database queries, and resource utilization too.

I think the most important thing is automated testing, including unit, integration, and performance tests, to catch potential problems early. load testing in a staging environment that mirrors production to see how new features perform under stress. Code reviews are essential for spotting performance pitfalls.

Baseline Performance metrics in Exisitng Environment: These metrics can include page load times, response times, server resource utilization, and database query performance. Before Deployment - Simulate real-world traffic patterns to assess how your web app performs under expected user loads. Identify bottlenecks and optimize performance accordingly and integrate it with CICD Monitor Real-User Performance: Use real-user monitoring (RUM) tools to collect performance data from actual users interacting with your web app in production. This provides valuable insights into real-world performance issues Profile and Optimize Code: Optimize critical code paths to improve execution speed and reduce resource consumption

Start with Test-Driven Development (TDD) to write tests before coding. This ensures new features meet expected behaviors from the start. Use CI tools to automate testing with each code commit. This catches bugs and conflicts early, minimizing the risk of performance regressions. These practices help maintain app stability and performance while adding new features.

To ensure new features don't harm the performance of your web app, focus on continuous monitoring. Implement real-time monitoring tools like New Relic, AppDynamics, or Datadog to track performance metrics continuously. These tools help you monitor key indicators such as page load times, server response times, and resource usage. By setting up alerts for performance degradation, you can quickly identify and address issues as they arise. Continuous monitoring allows you to detect and resolve performance bottlenecks introduced by new features, ensuring your web app remains responsive and efficient.

Ensuring new features don't harm web app performance hinges on continuous monitoring. Here’s the strategy: 1️⃣ Implement real-time performance monitoring tools. 2️⃣ Set up alerts for any performance anomalies detected. 3️⃣ Conduct load testing for new features before deployment. 4️⃣ Review and optimize code based on performance data regularly. This proactive approach helps in identifying and mitigating potential issues early, maintaining optimal app performance.

Avoid scattering the same flag across multiple layers or location in the application, as it increases maintenance overhead. Cleaning up unused flags is really important, unused flags creates confusion in future. Create different flags for different features, this will help rolling out the features gradually.

Static vs Dynamic Content Static content refers to files that don’t change frequently. These files are stored as-is on disk and served directly to users (Example: Help files, Styles etc). Static content can be hosted easily by setting up a web server (e.g., NGINX) to serve these files over HTTPS. No server-side processing is required Dynamic content is generated for each unique user. It’s created on the server side, often by making database requests. Choose the right mix based on your application requirements would improve performance.