---
session_id: "1373478"
title: "Jarred Sumner, Founder of Bun, Anthropic / Bun"
phase: live
last_checked: 2026-11-12T18:52:58-08:00
render: 20261113-025258-ddff00
---

# Links: Jarred Sumner, Founder of Bun, Anthropic / Bun

## Speaker

**Jarred Sumner**, Creator of Bun, Anthropic

- Site: [Jarred Sumner](https://jarredsumner.com/)
- X: [@jarredsumner](https://x.com/jarredsumner)
- GitHub: [Jarred-Sumner](https://github.com/Jarred-Sumner)

## Company

**[Bun](https://bun.com/)** (part of Anthropic): "Bun is a fast JavaScript
runtime & toolkit with a bundler, test runner, and npm-compatible package
manager built in." (from the site)

## Resources

- **Docs** · [Ahead-of-time compilation](https://bun.com/docs/compiler/aot)
  (Bun Docs, experimental). The compiler the talk is about: `bun compile` uses
  your TypeScript types to emit machine code at build time, with no JIT.
- **Blog** · [Rewriting Bun in Rust](https://bun.com/blog/bun-in-rust)
  (Bun, 2026-07-08, Jarred Sumner). The summer rewrite the talk compares to,
  safe because Bun's tests are written in TypeScript, not the runtime's language.
- **Blog** · [Bun is joining Anthropic](https://bun.com/blog/bun-joins-anthropic)
  (Bun, 2025-12-02, Jarred Sumner). Why Bun's memory and startup matter to
  Claude Code.
- **Repo** · [googleprojectzero/fuzzilli](https://github.com/googleprojectzero/fuzzilli).
  The JavaScript engine fuzzer (transcribed "Fuseeley") extended to test type
  predictions.
- **Repo** · [tc39/test262](https://github.com/tc39/test262). The ECMAScript
  conformance suite, one of the tests that predate the project.
- **Repo** · [microsoft/typescript-go](https://github.com/microsoft/typescript-go).
  The Go port of TypeScript the AOT-compiled version now beats single-threaded.

## Gaps

- No LinkedIn profile verifiably his.
- No Bun blog post on the ahead-of-time compiler yet; the talk says it is
  dogfooded internally and "external soon".
- The 4x memory and 2x startup figures for Claude Code, the five rewrites, the
  hourly Slack metrics card and the 140-agent batch have no public write-up found.
- The recording opens mid-sentence.
- No official recording or slides found yet. The dossier rechecks every 6 hours
  during the event.