WHY

🤔🤔🤔🤔🤔

JAVASCRIPT

V8 JIT

TS, JSX...

asm.js

Microsoft Chess

asm.js

WASM

WHAT

 😳😳😳😳😳

HIGH LEVEL GOALS

• Define a portable, size- and load-time-efficient binary format 

• Specify and implement incrementally

• Integrate well with the existing Web platform

• Make a great platform

WASM

 😨😨😨😨😨

😨😨😨😨😨

WASM

Efficient, safe, low-level bytecode for the Web

DEMO

WASM TANKS

Hello World

Node Add

WABT

Webassembly Studio

AssemblyScript

WHY FAST THAN JS

😏😏😏😏😏

DEMO

Different Entry Points

TurboFan vs Liftoff

More predictable performance than JS

USE CASES

• Squoosh

• UI toolkit QT

• Unity/Unreal Engine

USE CASES

• AutoCAD Web

• Source-map npm

• Windows2000

• Adobe Lightroom

• eBay barcode scanner

• Zoom for Web Client

• Sandspiel with Rust

• VIM online

RECOMMEND

• putting everything in wasm is not a good idea

• JS and wasm are not opponents, there is synery between them, use them togather

• No incentive for a web developer to learn C++

• Doesn't recommend write web component with C++,  do some performance, audits measurements, where are your bottlenecks. and see if wasm can help you.

“If you find a gap in the web platform that has been filled many times in another language，but not on the web, not in JS, wasm might be your tool.”