# High-Speed Web Applications

*JavaScript Performance Beyond the Basics*

Knowing how to run performance tests on your web app properly is one thing, and putting those metrics to good use is another. Both aspects are crucial for the overall success of your performance optimization efforts, which means you'll need to have a precise understanding of all the ins and outs of both performance data and performance tooling to ensure the best outcome. 
This workshop will explore various tools and techniques required to face this challenge, providing you with a complete roadmap for performance analysis and optimization.

## Description

The Chrome DevTools are a powerful addition to the developer’s toolset that allows finding and eliminating your app’s performance bottlenecks. It is packed with features perfect for auditing page performance and deriving actionable insights. By visualizing data at a proper level of abstraction, it can help you pinpoint performance-related issues and set a baseline from which to start introducing improvements.
That said, knowing how to run performance tests on your web application properly is one thing, and putting those metrics to good use is another. Both aspects are critical to the overall success of the endeavor. Thus it is so crucial to understand all the ins and outs of performance data and performance tooling.
This might sound like a lot but don’t be put off! Over the course of this training, we will walk through the pitfalls and tricks of the trade of Chrome DevTools to provide you with a complete roadmap for performance analysis and optimization. 
Chrome Developer Tools should be seen as a fount of knowledge about your app performance that anyone can benefit from. At that realization, the best part begins – experimenting and finding the most effective ways to improve the application’s speed.

## Takeaways

In this workshop, we will explore the exciting hidden DevTools features and learn about:
- Web Vitals – what they are and how to measure them
- Scripting, parsing, and prioritization
- Network analysis and request debugging
- The browser’s rendering pipeline
- How to read the performance timeline
- Frame drop, and why we should care about it
- Scheduling techniques and scheduling priority
- HTML structures, their styling and rendering in a browser
- The Paint Flash APIs and scroll performance issues
- Layer composition, layer squashing, and reflow triggers
- Main thread scheduling and non-blocking UIs