Creator of TypeScript: 10x Faster Typescript, Why AI Won't Replace SWEs | Anders Hejlsberg
The Peterman PodShow Notes
Anders Hejlsberg is the creator of TypeScript and C#, and I asked him about how the TypeScript compiler got 10x faster through a rewrite in Go and his thoughts on how AI has impacted software engineering.
• My ergonomic keyboard project I mentioned, you can follow along here: https://read.compose.llc/ • The Kickstarter page for it: https://www.kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done
Podcast links:
• YouTube: https://www.youtube.com/watch?v=cywK3XYYJ2o • Apple: https://podcasts.apple.com/us/podcast/the-peterman-pod/id1777363835 • Transcript: https://www.developing.dev/p/creator-of-typescript-10x-faster
Thank you to this episode's sponsors for supporting my work:
• WorkOS: makes your app Enterprise Ready with easy to use APIs to add SSO, SCIM, RBAC, and more in just a few lines of code, check them out at https://workos.com/ • Jira by Atlassian: Get more work done with your favorite agents and models all in one place, check them out at https://jira.dev/
Timestamps:
(00:00) Intro (00:48) Why write a compiler in JavaScript (07:29) Why rewrite the compiler in Go (14:49) LLMs for large migrations (20:12) Why Javascript is so popular (26:32) Why ever use Javascript on the backend (32:59) What it takes to build a programming language (37:06) Will there be fewer languages in 10 years (42:57) Hands on engineering vs delegation (49:14) Why fast tooling matters more now (51:16) AI software engineering predictions (58:52) The most technically challenging work (01:02:04) Top book recommendation (01:03:50) Advice for his younger self (01:05:00) Outro
Where to find Anders:
• GitHub: https://github.com/ahejlsberg • X/Twitter: https://x.com/ahejlsberg • Wikipedia: https://en.wikipedia.org/wiki/Anders_Hejlsberg • LinkedIn: https://www.linkedin.com/in/ahejlsberg/
Where to find Ryan:
• Newsletter: https://www.developing.dev/ • X/Twitter: https://x.com/ryanlpeterman • LinkedIn: https://www.linkedin.com/in/ryanlpeterman/ • Threads: https://www.threads.com/@ryanlpeterman • Instagram: https://www.instagram.com/ryanlpeterman • TikTok: https://www.tiktok.com/@ryanlpeterman
Referenced in this episode:
• Flow type checker repository: https://github.com/facebook/flow • TypeScript compiler repository: https://github.com/microsoft/TypeScript • Algorithms + Data Structures = Programs (book): https://en.wikipedia.org/wiki/Algorithms_%2B_Data_Structures_%3D_Programs • TypeScript native rewrite: https://devblogs.microsoft.com/typescript/announcing-typescript-7-0/
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