Tweet
Tweet

Slide 1

Slide 1 text

Running in Parallel Web Workers, Worklets and WebAssembly

Slide 2

Slide 2 text

Running in Parallel All the Buzz Words, I ever heard

Slide 3

Slide 3 text

Running in Parallel The Way to Performance

Slide 4

Slide 4 text

Vitalii Bobrov • Lead SW Engineer @ EPAM • Angular Wrocław organizer • Performance warrior @bobrov1989 https://bobrov.dev

Slide 5

Slide 5 text

Topics • Parallel Computations • Web Workers • Worklets • Web Assembly & AssemblyScript

Slide 6

Slide 6 text

Parallel Computations

Slide 7

Slide 7 text

Border Control

Slide 8

Slide 8 text

Passport Control Border Line One Thread

Slide 9

Slide 9 text

Passport Control Border Line One Thread

Slide 10

Slide 10 text

Passport Control Border Line One Thread

Slide 11

Slide 11 text

Passport Control Border Line Async

Slide 12

Slide 12 text

Passport Control Border Line Async

Slide 13

Slide 13 text

Passport Control Border Line Async

Slide 14

Slide 14 text

Passport Control Border Line Async

Slide 15

Slide 15 text

Passport Control Border Line Async

Slide 16

Slide 16 text

Parallel doesn’t mean X times faster

Slide 17

Slide 17 text

Passport Control Border Line Multi Thread Passport Control Line

Slide 18

Slide 18 text

Passport Control Border Line Multi Thread Passport Control Line

Slide 19

Slide 19 text

Passport Control Border Line Multi Thread Passport Control Line

Slide 20

Slide 20 text

Thread is not equal to CPU core

Slide 21

Slide 21 text

All Passports Border Line Worker / Worklet EU Passports Line

Slide 22

Slide 22 text

All Passports Border Line Worker / Worklet EU Passports Line

Slide 23

Slide 23 text

All Passports Border Line Worker / Worklet EU Passports Line

Slide 24

Slide 24 text

Complicate Code

Slide 25

Slide 25 text

Web Workers

Slide 26

Slide 26 text

UI Blocking

Slide 27

Slide 27 text

Disappointed User

Slide 28

Slide 28 text

const worker = new Worker('path/to/worker.js'); Init Web Worker

Slide 29

Slide 29 text

Full-Duplex Communication Main Thread Worker Thread worker.postMessage('data'); worker.addEventListener('message', (event: MessageEvent) => { console.log(event.data); }); addEventListener('message', (event: MessageEvent) => { console.log(event.data); }); postMessage('response');

Slide 30

Slide 30 text

Worker implementation addEventListener('message', ({ data }) => { data.sort((a, b) => { for (let i = 0; i < 10000; i++) { const sum = i * Math.random() * 10; } return a.order - b.order; }); postMessage(data); });

Slide 31

Slide 31 text

Off-thread

Slide 32

Slide 32 text

Worklets

Slide 33

Slide 33 text

Available Worklets • Paint • Animation • Layout • Audio

Slide 34

Slide 34 text

Paint API

Slide 35

Slide 35 text

Half-Duplex Communication Main Thread Worklet Thread class CirclesPainter { static get inputProperties() { return [ '--circles-offset', '--circles-count', '--circles-opacity' ]; } } element.style .setProperty('--circles-offset', 10);

Slide 36

Slide 36 text

Half-Duplex Communication Main Thread Worklet Thread class CirclesPainter { static get inputProperties() { return [ '--circles-offset', '--circles-count', '--circles-opacity' ]; } } :root { --circles-count: 2; --circles-offset: 10; --circles-opacity: 1; }

Slide 37

Slide 37 text

Create Worklet class MyPaint { paint(ctx: CanvasRenderingContext2D) { ctx.beginPath(); ctx.arc(x, y, outerRadius, 0, Math.PI * 2, false); ctx.arc(x, y, innerRadius, 0, Math.PI * 2, true); ctx.fill(); } } registerPaint('my-paint', MyPaint);

Slide 38

Slide 38 text

Load Worklet if ('paintWorklet' in CSS) { CSS.paintWorklet.addModule('my-paint'); }

Slide 39

Slide 39 text

Use Worklet .circle { background: #999 paint(my-paint); }

Slide 40

Slide 40 text

QR Code

Slide 41

Slide 41 text

Chart

Slide 42

Slide 42 text

WebAssembly

Slide 43

Slide 43 text

WASM - binary instruction format for a stack-based VM

Slide 44

Slide 44 text

WHAT ?!

Slide 45

Slide 45 text

WTF ?!

Slide 46

Slide 46 text

WAT WebAssembly Text Format

Slide 47

Slide 47 text

Devs are Good in Naming

Slide 48

Slide 48 text

Available Options • Rust • C/C++ • TypeScript via AssemblyScript

Slide 49

Slide 49 text

Install npm install assemblyscript

Slide 50

Slide 50 text

Init npx asinit .

Slide 51

Slide 51 text

Build npm run asbuild

Slide 52

Slide 52 text

Basic function import 'allocator/tlsf'; export function add(a: i32, b: i32): i32 { return a + b; }

Slide 53

Slide 53 text

Load WASM module import { instantiateStreaming, ASUtil } from 'assemblyscript/lib/loader'; interface MyApi { add(a: number, b: number): number; } const imports: any = {}; async function main(): void { var interop: ASUtil = await instantiateStreaming(fetch('../build/untouched.wasm'), imports); console.log("The result is:", interop.add(1, 2)); }

Slide 54

Slide 54 text

Running in Parallel Performance of Heavy Tasks

Slide 55

Slide 55 text

@bobrov1989 https://bobrov.dev Vitalii Bobrov