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A 10x faster TypeScript

Microsoft Developer · 608.3K views · 2025-03-11 · 13:45

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Overview

Anders Hejlsberg introduces the native port of the TypeScript compiler, written in Go, which promises roughly 10x faster tooling. He demos compiling VS Code and explains where the speedup comes from.

On Hacker News

Commenters cite it as the authoritative source for why the port is faster and why Go was chosen.

Recommended by 2 HN people across 2 months · HN mentions 2025–2025

Topics

Compilers, interpreters & program analysisWeb developmentSoftware performance & optimization
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typescriptgocompilersanders hejlsbergnative port

What people said

yomismoaqui · 2025-08 · Recommendation

After hearing the explanation about why he picked Go for the Typescript compiler I can only be more of a fan of Anders Hejlsber. He said that Go was chosen due to its suitability for the workload, offering low-level control, optimized native code, automatic memory management, and concurrency. And this coming from the same guy that created C#, Typescript, Delphi & Turbo Pascal shows how a real engineer takes a decision of this magnitude. Is Go the best decision for every SW project? No, but in this case the arguments (and the tests they did during their evaluation) check out. And no, picking F# simply because you love the language is not a mature decision. You can check his arguments here: [VIDEO]

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odyssey7 · 2025-03 · Recommendation

The key: > immutable data structures --> "we are fully concurrent, because these are what I often call embarrassingly parallelizable problems" The relationship of their performance gains to functional programming ideas is explained beginning at 8:14 [VIDEO]

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kristianp · 2025-05 · Reference

Here's the FAQs, where they explain the decision to go with Go and not, say, rust. [LINK] Hejlsberg also says in this video, about 3.3x performance is from going native and the other 2-3x is by using multithreading. [VIDEO]

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Sources

Video by Microsoft Developer, played through YouTube.

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