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...and the future of computing Webassembly Wonderful !

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Matthias Endler ...works at trivago ...mostly Backend ...afraid of Frontend ...Python/Golang/Rust ...Runs "Hello Rust" https://endler.dev

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hello-rust.show

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? ? ?

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Ritchie Thompson Kernighan

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" UNIX is very simple.
 It just takes a genius
 to understand its simplicity. " -- Dennis Ritchie

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" C is what made
 Unix portable " -- Dennis Ritchie

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WWW Hello, World!

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function Vb(d) { d = d | 0; var e = 0, f = 0, h = 0, j = 0, k = 0, l = 0, m = 0, n = 0, o = 0, p = 0, q = 0, r = 0, s = 0; e = i; i = i + 12 | 0; f = e | 0; [l + 4 >> 2] = 0; l = (c[1384465] | 0) + 3 | 0; do { if (l >>> 0 < 26) { if ((c[1356579] | 0) > 0) { m = d + 4 | 0; n = 0; while (1) { o = c[(c[1356577] | 0) + (n << 2) >> 2] | 0; do { if (a[o + 22 | 0] << 24 >> 24 == 24) { if (!(Vp(d, o | 0) | 0)) { break } p = (c[m >> 2] | 0) + (((c[h >> 2] | 0) - 1 | 0) * 40 & -1) + 12 | 0; q = o + 28 | 0; c[p >> 2] = c[q >> 2] | 0; c[p + 4 >> 2] = c[q + 4 >> 2] | 0; c[p + 8 >> 2] = c[q + 8 >> 2] | 0; c[p + 12 >> 2] = c[q + 12 >> 2] | 0; c[p + 16 >> 2] = c[q + 16 >> 2] | 0; asm.js

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[Source]

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•Performance differences between browsers •Still requires 
 parsing, compiling, optimising •No specification Disadvantages of asm.js

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Enter WASM (Webassembly)

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•Fast •Safe •Well defined •Language-independent •Streamable •Parallelizable Wasm is . . .

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Wasm is . . . 
 neither web nor assembly

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Decoding Validation Execution

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https://blog.logrocket.com/webassembly-how-and-why-559b7f96cd71/

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i32, i64, f32, f64 that's it. Datatypes!

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1 5 3

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1 5 3 0

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(module)

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0000000: 0061 736d ; WASM_BINARY_MAGIC 0000004: 0100 0000 ; WASM_BINARY_VERSION

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( func )

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// JavaScript
 function add(a, b) { return a + b; }

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(func (param i32) (param i32) (result f64) )

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(func (param i32) (param f32) (local f64) get_local 0 get_local 1 get_local 2 )

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(func (param $foo i32) (param $bar f32) (local $baz f64) get_local $foo get_local $bar get_local $baz )

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(module ( func (param $a i32) (param $b i32) (result i32) get_local $a get_local $b i32.add ) )

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(module (func $add (param $a i32) (param $b i32) (result i32) get_local $a get_local $b i32.add) (export "add" (func $add)) )

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(module (type $type0 (func (result i32))) (table 0 anyfunc) (memory 1) (export "memory" memory) (export "hello" $func0) (func $func0 (result i32) i32.const 16 ) (data (i32.const 16) "Hello World\00" ) )

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wasm2wat wat2wasm

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0 750 1500 2250 3000 Go C Rust How big is " Hello World " (in KB)? 40k 1k

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0 750 1500 2250 3000 Go C Rust "Hello World" unoptimized (KB) 40k 1k

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0 750 1500 2250 3000 Go C Rust "Hello World" unoptimized (KB) 20k 400 bytes

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Examples!

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Wasm!

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https://endler.dev/2019/tinysearch

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https://squoosh.app/editor

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" Serverless "

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https://wapm.io/

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https://hacks.mozilla.org/2019/03/standardizing-wasi-a-webassembly-system-interface/

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https://www.youtube.com/watch?v=QKTh5Xj60pI

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Thanks! endler.dev/talks