Julian Jandl
Engineering Manager, push-based.io | Austria
Talk
Inside the JavaScript Heap: Finding and Fixing Memory Leaks
With this talk I want to invite you to a deep dive into the memory analysis of javascript applications. I will point out the theoretical concepts of javascripts memory consumption, the garbage collection process, the memory heap and memory leak identification.
Based on comprehensive demo applications I will walk you through a methodical approach on how to identify and fix memory leaks while showcasing the latest available developer tools.
Core Message / Takeaways
- How to inspect and analyze the JS Heap
- How to detect memory leaks
- How to automate memory leak detection using memlab
About Julian Jandl
As an RxAngular core maintainer he is contributing his knowledge to the community.
Workshop
High-Speed Web Applications - Master Class (In-Person & Online)
Chrome DevTools is a powerful addition to the developer's toolset that allows you to find and eliminate your application's performance bottlenecks. It is packed with features perfect for auditing page performance and deriving actionable insights. By visualizing data at the 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 properly run performance tests on your web application 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 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 DevTools should be seen as a fount of knowledge about your application's performance that anyone can benefit from. With that realization, the best part begins: experimenting and finding the most effective ways to improve the application's speed.
High-Level Workshop Agenda
Block 1: The Browser Rendering Pipeline
- Understand how the browser processes the code you write
- Explore the runtime performance of scripting, rendering, and painting
- Minimize the work the browser needs to do
Core Web Vitals
- What is the performance score?
- LCP, Soft-LCP, INP, CLS, and other important metrics
- How to measure and improve Web Vitals
Understand the RAIL Model
- Get to know the underlying model behind modern performance metrics
Coffee Break
Block 2: Tooling
- How to read, record, and analyze flame charts
- Performance panel
- Performance Insights panel
- Performance Monitor
- Network panel
- Chrome and Microsoft Edge DevTools
- Lighthouse
AI-Assisted Performance Engineering
- How to leverage AI as a performance engineer
- Chrome DevTools MCP
- Create and use performance engineering skills
Lunch Break
Block 3: The JavaScript Event Loop
- Understand how the JavaScript VM executes code
- Learn the difference between macrotasks and microtasks
- Gain in-depth knowledge of scheduling techniques
- Control the event loop by prioritizing work
- Master single-threaded main-thread scheduling
Coffee Break
Block 4: Network
- Image optimizations
- Resource hints, including preload, prefetch, and priorities
- Bundle optimizations
CSS and DOM Performance Best Practices
- Forced reflow and layout thrashing
- CSS containment and content visibility
- Next-generation CSS features
- ResizeObserver and IntersectionObserver
Q&A Session
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