Stefan Schöberl

WebAssembly: Disassembled

How does WebAssembly actually work? Go beyond compilers and see its stack machine and raw text format in action, live-coded from scratch.

WebAssembly: Disassembled
#1about 2 minutes

What WebAssembly is and its role on the web

WebAssembly is a W3C standard that complements JavaScript for performance-heavy tasks while running in the same security sandbox.

#2about 3 minutes

The architecture of a WebAssembly module

A WebAssembly module interacts with an external environment like JavaScript through imports and exports for functions, memory, and global variables.

#3about 1 minute

Binary (.wasm) versus textual (.wat) representation

WebAssembly modules have an interchangeable binary format (.wasm) for execution and a human-readable textual format (.wat) for debugging.

#4about 4 minutes

How the WebAssembly stack machine execution model works

WebAssembly uses a stack machine for execution, where instructions manipulate values on a stack to perform computations.

#5about 5 minutes

Live coding a recursive Fibonacci function in .wat

A live coding demonstration shows how to implement the recursive Fibonacci algorithm using WebAssembly's textual format (.wat).

#6about 4 minutes

How to implement loops using block and loop statements

WebAssembly constructs loops using structured block and loop statements with indexed labels for branching, which replace traditional goto statements.

#7about 5 minutes

Live coding how to find the maximum value in an array

This live coding example demonstrates how to iterate through an array in memory to find its maximum value using WebAssembly bytecode.

#8about 2 minutes

Q&A on modules, security, and language recommendations

The speaker answers audience questions about connecting multiple modules, using WebAssembly for secure software supply chains, and the best languages to start with.

Related jobs
Jobs that call for the skills explored in this talk.

Matching moments

Using AI to overcome challenges in systems programming
02:49 MIN

Using AI to overcome challenges in systems programming

AI in the Open and in Browsers - Tarek Ziadé

Why you might not need JavaScript for everything
02:33 MIN

Why you might not need JavaScript for everything

WeAreDevelopers LIVE – You Don’t Need JavaScript, Modern CSS and More

The value of progressive enhancement and semantic HTML
03:31 MIN

The value of progressive enhancement and semantic HTML

WeAreDevelopers LIVE – You Don’t Need JavaScript, Modern CSS and More

Exploring modern JavaScript performance and new CSS features
08:07 MIN

Exploring modern JavaScript performance and new CSS features

WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More

The only frontend stack that truly matters
11:10 MIN

The only frontend stack that truly matters

WeAreDevelopers LIVE – Frontend Inspirations, Web Standards and more

The industry's focus on frameworks over web fundamentals
11:32 MIN

The industry's focus on frameworks over web fundamentals

WeAreDevelopers LIVE – Frontend Inspirations, Web Standards and more

The security challenges of building AI browser agents
06:33 MIN

The security challenges of building AI browser agents

AI in the Open and in Browsers - Tarek Ziadé

Navigating the growing complexity of modern CSS
09:00 MIN

Navigating the growing complexity of modern CSS

WeAreDevelopers LIVE – You Don’t Need JavaScript, Modern CSS and More

Featured Partners

Related Videos

See all videos
Wasm Deep Dive - A Glance Behind the Scenes57:45

Wasm Deep Dive - A Glance Behind the Scenes

Rainer Stropek

Using WebAssembly to run, extend, and secure your application25:08

Using WebAssembly to run, extend, and secure your application

Niels Tanis

WebAssembly Revolution: Elevating JavaScript's Reach and Performance30:57

WebAssembly Revolution: Elevating JavaScript's Reach and Performance

Önder Ceylan

WebAssembly: The Next Frontier of Cloud Computing30:58

WebAssembly: The Next Frontier of Cloud Computing

Edoardo Dusi

WebAssembly: The Next Frontier of Cloud Computing57:32

WebAssembly: The Next Frontier of Cloud Computing

Edoardo Dusi

The Future of Cloud is WebAssembly29:49

The Future of Cloud is WebAssembly

Matt Butcher

Using WebAssembly for in-database Machine Learning58:53

Using WebAssembly for in-database Machine Learning

Akmal Chaudhri

Rust Beyond Systems: Revolutionizing Web Development30:10

Rust Beyond Systems: Revolutionizing Web Development

Patrick Koss

Related Articles

View all articles
LM
Luis Minvielle
The Best Upcoming IT Webinars
Now that you already know what IT webinars are and how they can help you level up your professional appeal, you might want actually to get into one. Live tech webinars are one of the best ways to stay on top of the latest trends and tools because eit...
The Best Upcoming IT Webinars
CH
Chris Heilmann
All the videos of Halfstack London 2024!
Last month was Halfstack London, a conference about the web, JavaScript and half a dozen other things. We were there to deliver a talk, but also to record all the sessions and we're happy to share them with you. It took a bit as we had to wait for th...
All the videos of Halfstack London 2024!
CH
Chris Heilmann
WWC24 Talk - Scott Hanselman - AI: Superhero or Supervillain?
Join Scott Hanselman at WWC24 to explore AI's role as a superhero or supervillain. Scott shares his 32 years of experience in software engineering, discusses AI myths, ethical dilemmas, and tech advancements. Engage with his live demos and insights o...
WWC24 Talk - Scott Hanselman - AI: Superhero or Supervillain?

From learning to earning

Jobs that call for the skills explored in this talk.