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.

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Matching moments

Navigating the WebAssembly ecosystem and foundations
05:41 MIN

Navigating the WebAssembly ecosystem and foundations

WebAssembly: The Next Frontier of Cloud Computing

Understanding the original design goals of WebAssembly
04:49 MIN

Understanding the original design goals of WebAssembly

The Future of Cloud is WebAssembly

The core components of the WebAssembly ecosystem
02:40 MIN

The core components of the WebAssembly ecosystem

WebAssembly: The Next Frontier of Cloud Computing

Defining WebAssembly and its original design goals
05:41 MIN

Defining WebAssembly and its original design goals

Fun with PaaS – How to use Cloud Foundry and its uniqueness in creative ways

How .NET applications execute on WebAssembly
01:25 MIN

How .NET applications execute on WebAssembly

Using WebAssembly to run, extend, and secure your application

How WebAssembly works as a universal compilation target
05:42 MIN

How WebAssembly works as a universal compilation target

WebAssembly Revolution: Elevating JavaScript's Reach and Performance

Taking WebAssembly beyond the browser with WASI
03:13 MIN

Taking WebAssembly beyond the browser with WASI

Using WebAssembly to run, extend, and secure your application

Key features and concepts of WebAssembly modules
03:39 MIN

Key features and concepts of WebAssembly modules

WebAssembly: The Next Frontier of Cloud Computing

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