High-Speed Web Applications

A two day in-depth workshop that focuses on performance, explores exciting hidden DevTools features and equips participants with powerful techniques to run performance tests properly.

Level : IntermediateDomains

DevTools

JavaScript

TypeScript

Book in-house workshop

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

Agenda

The browser render pipeline
- Understand how the browser processes the code you write
- Runtime performance of scripting, rendering, and painting
- Minimize the work the browser needs to do
(Core) Web Vitals
- What is the performance score?
- LCP, INP and CLS as well as all other important metrics
- How to measure and improve web vitals?
Understand the RAIL-model
- Get to know the underlying model behind modern performance metrics
Tooling
- How to read, record and analyze flame charts
- Performance Tab
- Performance Insights Tab
- Performance Monitor
- Network Tab
- Chrome & MS Edge DevTools
- Lighthouse
- Userflow
- Memlab
The JavaScript event loop
- Understand how the JavaScript vm executes code
- Learn the difference between macrotasks & microtasks
- Gain in-depth knowledge about scheduling techniques
- Control the event loop by prioritizing work
- Master the single thread - main thread scheduling
Leveraging browser native features for better performance
- Project Aurora
- Resource hints
- Priority hints
- ResizeObserver & IntersectionObserver

CSS and DOM performance best practices
- Forced reflow, layout thrashing
- CSS containment & content visibility
- Next generation CSS features
- ResizeObserver & IntersectionObserver
JavaScript Memory Analysis
- Understand how JavaScript applications consume memory
- How to inspect the memory heap
- How identify memory leaks
- Strategic approaches how to fix memory leaks
Ship less and more efficient
- Network analysis and improvement strategies
- Bundle size analysis & shipping as less code as possible
- Resource hints
- Priority hints
JavaScript & TypeScript language best practices
- Choose the right data structure
- Looping performance
Auditing, monitoring & measurement
- How to conduct a performance audit?
- What and how to measure?
Performance code review checklist