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Life & fun · February 9, 2025

Oxidase – Transpiles TypeScript at the Speed of Parsing

Hi HN, Oxidase is my experiment to build a TypeScript transpiler that works like ts-blank-space[0] and Node.js' built-in type stripping[1], but also supports enums and namespaces. I've tried some optimizations on it and am surprised to find that it's now as fast as oxc, the TypeScript parser it's based on. Check the link for the benchmark results and details on how I make this possible if you are interested. The name pays homage to oxc (same prefix) and sucrase[2] (name for another type of enzyme), where I borrowed the idea of no AST allocation optimization. [0]…

Oxidase – Transpiles TypeScript at the Speed of Parsing launched on February 9, 2025 with 5 votes and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.

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What it does

Transpiles TypeScript at the Speed of Parsing. Contribute to wan9chi/oxidase development by creating an account on GitHub.

$ node --import oxidase/register your-ts-file.ts JavaScript API import { transpile } from 'oxidase' ; transpile ( "let a: number = 1" ) ; // returns 'let a = 1' Type-Stripping Transpilers Type-stripping is a clever technique to transpile TypeScript by erasing the types and replacing them with whitespace. This approach preserves positions of all JavaScript code in the output, eliminating the need for sourcemaps. The idea originated from ts-blank-space , and was later implemented by swc_fast_ts_strip in Rust, as the default built-in TypeScript transpiler in Node.js v22.6.0+. Type-stripping inherently lacks support for non-erasable syntaxes such as enums, namespaces, and parameter properties.…from github.com

In the maker’s words, at launch

Hi HN, Oxidase is my experiment to build a TypeScript transpiler that works like ts-blank-space[0] and Node.js' built-in type stripping[1], but also supports enums and namespaces. I've tried some optimizations on it and am surprised to find that it's now as fast as oxc, the TypeScript parser it's based on. Check the…

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