A systems-level look at the TypeScript compiler. How it converts a file into something into data, checks the validity of that data and finally creates .js files on the disk.

This talk will be a subset of the attached video.

Oliver is a TC39 Invited Expert and the creator of Porffor – an experimental Ahead-Of-Time (AOT) JavaScript engine that can compile TypeScript to Wasm and native code. It has graduated from being a hobby project to now being a full-time activity.

In this talk, Oliver will show how native TypeScript support in JavaScript engines can present interesting optimization opportunities. Type annotations from TypeScript can act as hints to the AOT compiler to allow optimizations that reduce output size, improve performance, and more!

Ashley is a JavaScript Infrastructure developer at Bloomberg and a TypeScript contributor. As a TC39 delegate, he has helped advance several JavaScript language proposals, notably championing ES2023’s Change Array by Copy.

Unlike Porffor, most JavaScript engines cannot execute TypeScript natively and therefore need to compile TypeScript into JavaScript before it can be run. This talk will explore an innovative compilation technique for TypeScript that can be used to speed up this type-stripping process, in addition to offering developers several other benefits.

Nessa palestra irei explorar como fazer tipagem em tempo de execução no Node, similar ao que temos por padrão em Golang, onde não podemos mentir para o tipo e evitarmos inconsistências e bugs, sem a necessidade de usar type casting