Lin Clark Mozilla
Most images taken from Lin Clark's articles:
https://hacks.mozilla.org/author/lclarkmozilla-com/
What are we going to talk about?
What is WebAssembly?
Performance History
JS after JIT
Performance History
After WASM?
JIT Compilers
JIT Compiler
JIT Compiler
Interpreted Code
Compiled Code
JIT Compiler
Interpreted Code
JIT Compiler
Compiled Code
JIT Compiler
Interpreter
JIT Compiler
Baseline Compiler
JIT Compiler
Optimizing Compiler
JIT Compiler
JIT Compiler Example
function arraySum(arr) {
var sum = 0;
for (var i = 0; i < arr.length; i++) {
sum += arr[i];
}
}
JIT Compiler Example
function arraySum(arr) {
var sum = 0;
for (var i = 0; i < arr.length; i++) {
sum += arr[i];
}
}
JIT Compiler Example
JIT Compiler Example
Assembly Crash Course
Assembly Crash Course
Assembly Crash Course
Assembly Crash Course
Assembly Crash Course
Assembly Crash Course
Assembly Crash Course
Working with WebAssembly
Working with WebAssembly
Working with WebAssembly
function fetchAndInstantiate(url, importObject) {
return fetch(url).then(response =>
response.arrayBuffer()
).then(bytes =>
WebAssembly.instantiate(bytes, importObject)
).then(results =>
results.instance
);
}
Working with WebAssembly
Working with WebAssembly
Working with WebAssembly
Working with WebAssembly
Working with WebAssembly
What makes WebAssembly fast?
What makes WebAssembly fast?
JS Early Days
What makes WebAssembly fast?
JS Early Days
JS Today
What makes WebAssembly fast?
WebAssembly
JavaScript
What makes WebAssembly fast?
Parsing
What makes WebAssembly fast?
Compiling + Optimizing
What makes WebAssembly fast?
Reoptimizing
What makes WebAssembly fast?
Execution
What makes WebAssembly fast?
Garbage Collection
What makes WebAssembly fast?
State of WebAssembly
State of WebAssembly
State of WebAssembly
Trampolining
State of WebAssembly
No direct DOM Manipulation
State of WebAssembly
Demo