Client Says Your Awesome Web App Works Slowly. Now What?

Learn effective strategies for diagnosing and resolving performance issues in web applications through this informative conference talk. Discover how to identify bottlenecks, utilize browser developer tools, and implement simple yet powerful optimizations for both frontend and backend components. Explore techniques such as caching, CSS and JS optimization, dynamic imports, content placeholding, and optimistic updates to enhance perceived and actual speed. Gain insights into monitoring tools like JConsole for JVM applications and learn how to analyze REST endpoints and database performance. Walk away with a comprehensive plan to address client complaints about slow-loading web apps and improve overall user experience.

Intro
Client says
NOBODY
Where to start?
Page speed
Developer Tools in browser(s)
Developer Tools - performance
Monitoring
JConsole (for JVM)
What to tune up on the front?
Cache
CSS and JS
Problem?
Where is the load?
Webpack Bundle Analyzer
Dynamic imports
Content placeholding
Optimistic updates
What to tune up on the backend?
REST
Database
Here's the plan