brimstone

New JavaScript engine written in Rust

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3Distinct people

4Mentions

0Explicit recommenders

1.3KGitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

New JavaScript engine written in Rust

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

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Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by week4 dated mentions

Observed mentions: 2025-11-15 21:42:38 UTC to 2026-01-04 12:43:29 UTC. Weeks start Monday, UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
Nov 10	2025-11-10 00:00:00 UTC	2025-11-17 00:00:00 UTC	3	1	2
Nov 17	2025-11-17 00:00:00 UTC	2025-11-24 00:00:00 UTC	0	0	0
Nov 24	2025-11-24 00:00:00 UTC	2025-12-01 00:00:00 UTC	0	0	0
Dec 1	2025-12-01 00:00:00 UTC	2025-12-08 00:00:00 UTC	0	0	0
Dec 8	2025-12-08 00:00:00 UTC	2025-12-15 00:00:00 UTC	0	0	0
Dec 15	2025-12-15 00:00:00 UTC	2025-12-22 00:00:00 UTC	0	0	0
Dec 22	2025-12-22 00:00:00 UTC	2025-12-29 00:00:00 UTC	0	0	0
Dec 29	2025-12-29 00:00:00 UTC	2026-01-05 00:00:00 UTC	1	0	1

What Hacker News says

4 sources

ForHackernews·Jan 4, 2026

Is this right? Brimstone has a single contributor, 74k LoC (vs 1.3M for V8) and it's 97% compatible with ES6? That's a staggering accomplishment. https://github.com/Hans-Halverson/brimstone

In JavaScript engines zoo – Compare every JavaScript engine

HansHalverson·Nov 16, 2025

Brimstone does embed Unicode tables, but a smaller set than Boa embeds: https://github.com/Hans-Halverson/brimstone/tree/master/icu. Brimstone does try to use the minimal set of Unicode data needed for the language itself. But I imagine much of the difference with Boa is because of Boa's support for the ECMA-402 Internationalization API (https://tc39.es/ecma402/).

In Brimstone: ES2025 JavaScript engine written in Rust

ivankra·Nov 16, 2025Submission

Brimstone: ES2025 JavaScript engine written in Rust

239 points · Open discussion

ivankra·Nov 15, 2025

> Not seeing V8, SpiderMonkey JavaScriptCore is very strange... They do compare with JIT-less V8 and SpiderMonkey there, just JSC is missing. I recently did my own benchmarking with a lot more engines, including other Rust engines: https://ivankra.github.io/javascript-zoo/?v8=true Personally, I'm more impressed with https://github.com/Hans-Halverson/brimstone - it is faster, nearly just as full featured (almost full ES2025) and last but not least, a single person project.

In Boa: A standard-conforming embeddable JavaScript engine written in Rust