Rust and WebAssembly for the masses

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@sendilkumarn Hej! Stockholm

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@sendilkumarn Every progra!"ing language has trade-offs. Choose one that solves your problem, not creates one.

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Rust and WebAssembly Sendil Kumar N

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@sendilkumarn Sendil Kumar

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@sendilkumarn

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@sendilkumarn Netherlands

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@sendilkumarn Senior Software Engineer @uber

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@sendilkumarn Passionate about Open Source Senior Software Engineer @uber

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@sendilkumarn Passionate about Open Source Senior Software Engineer @uber Team member @JHipster

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@sendilkumarn Passionate about Open Source Senior Software Engineer @uber Team member @JHipster Hacking on WebAssembly

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What is WASM? How WASM helps? DEMO Why Rust? Rust and WASM DEMO WASM Roadmap Agenda @sendilkumarn

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WebAssembly @sendilkumarn

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Yet Another Frontend framework?

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@sendilkumarn 00 61 73 6D 01 00 00 00 Native Code WebAssembly Binary JavaScript Javascript Engine

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@sendilkumarn func add is called Stack get_local $lhs LHS RHS get_local $rhs i32.add SUM Structured stack machine

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@sendilkumarn 00 61 73 6D 01 00 00 00 Size & Load time efficient

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@sendilkumarn Native Speed 00 61 73 6D 01 00 00 00

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@sendilkumarn madewithwebassembly.com

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Why not JavaScript? @sendilkumarn

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JavaScript is awesome @sendilkumarn

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JavaScript is easy @sendilkumarn

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JavaScript is weird* * - sometimes @sendilkumarn

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[] + {} @sendilkumarn

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[] + {} “[object Object]” @sendilkumarn

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{} + [] @sendilkumarn

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0 {} + [] @sendilkumarn

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[] + {} === {} + [] @sendilkumarn

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[] + {} === {} + [] True @sendilkumarn

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@sendilkumarn JavaScript Tuning

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@sendilkumarn Types

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@sendilkumarn Polymorphism

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@sendilkumarn Unpredictable Performance

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@sendilkumarn Runtime exceptions

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@sendilkumarn A B

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@sendilkumarn A B [empty x 5] []

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@sendilkumarn A B [1, empty x 4] [1, 2, empty x 3] [1, 2, 3, empty x 2] [1, 2, 3, 4, empty x 1] [1, 2, 3, 4, 5] [1] [1, 2] [1, 2, 3] [1, 2, 3, 4] [1, 2, 3, 4, 5]

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@sendilkumarn A B Holey Array Packed Array

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@sendilkumarn How WebAssembly address the problems?

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@sendilkumarn Speed

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@sendilkumarn Near Native perf.

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@sendilkumarn ˜30% faster than JS

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@sendilkumarn Boundary Crossing

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@sendilkumarn Not always faster

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@sendilkumarn WebAssembly is secure

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@sendilkumarn Linear Memory Model

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@sendilkumarn Shared Array Buffer

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@sendilkumarn How it works… Why it is faster?

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@sendilkumarn JavaScript Execution

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@sendilkumarn Load JavaScript

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@sendilkumarn a.js AST 1001010010101101010 Execute Profiler Parse Interpret Compile 100101001010 Optimise 1010 GC

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@sendilkumarn WebAssembly Execution

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@sendilkumarn Load WebAssembly

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@sendilkumarn Decode Compile Execute 00 61 73 6D 00 61 73 6D 00 61 73 6D

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@sendilkumarn PARSE COMPILE OPTIMISE EXECUTE GC JavaScript execution DECODE COMPILE EXECUTE WebAssembly execution

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@sendilkumarn PARSE COMPILE OPTIMISE EXECUTE GC JavaScript execution DECODE COMPILE EXECUTE WebAssembly execution I am faster

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@sendilkumarn PARSE COMPILE OPTIMISE EXECUTE GC JavaScript execution DECODE COMPILE EXECUTE WebAssembly execution Optimised already

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@sendilkumarn Streaming compilation

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@sendilkumarn Typed

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@sendilkumarn (module )

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@sendilkumarn (module (func $add (param $lhs i32) (param $rhs i32) (result i32) (get_local $lhs) (get_local $rhs) (i32.add) ) )

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@sendilkumarn (module (func $add (param $lhs i32) (param $rhs i32) (result i32) (get_local $lhs) (get_local $rhs) (i32.add) ) (export “add” (func $add)) )

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@sendilkumarn i32 i64 f32 f64 00 61 73 6D 01 00 00 00 WebAssembly Binary JavaScript Javascript Engine

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Demo bit.ly/wasm2020-001 @sendilkumarn

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Why Rust? @sendilkumarn

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@sendilkumarn Blazingly fast @sendilkumarn

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@sendilkumarn Memory Safety

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@sendilkumarn Productivity

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@sendilkumarn Friendly compiler

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@sendilkumarn Better tooling support

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@sendilkumarn Awesome co!"unity

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@sendilkumarn Modern language

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@sendilkumarn Crates

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@sendilkumarn wasm_bindgen https://github.com/rustwasm/wasm-bindgen

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@sendilkumarn i32 i64 f32 f64 00 61 73 6D 01 00 00 00 WebAssembly Binary JavaScript Javascript Engine

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@sendilkumarn 00 61 73 6D 01 00 00 00 WebAssembly Binary JavaScript Javascript Engine Binding JS file JS API WEB API JS SYS WEB SYS

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@sendilkumarn wasm_pack https://github.com/rustwasm/wasm-pack

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@sendilkumarn PACK PUBLISH TEST BUILD

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@sendilkumarn wasm_snip https://github.com/rustwasm/wasm-snip

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@sendilkumarn twiggy https://github.com/rustwasm/twiggy

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@sendilkumarn Rust demo First demo wasm-game-of-life

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@sendilkumarn Future

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@sendilkumarn Threads

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@sendilkumarn ⚠ Exception Handling

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@sendilkumarn ♻ Garbage Collection

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@sendilkumarn WebAssembly provides a platform to plug and play best parts from different languages and use them together.