js.rs

An experimental Javascript parser and just-in-time compiler written in Rust

Web Development Languages & Compilers

Explore on GitHub Read Hacker News discussions

2Distinct people

2Mentions

0Explicit recommenders

140GitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

An experimental Javascript parser and just-in-time compiler 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.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

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, 3:56:07 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 day2 dated mentions

Observed mentions: 2014-08-04 06:33:32 UTC to 2014-08-27 17:26:18 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	Comments
Aug 4	2014-08-04 00:00:00 UTC	2014-08-05 00:00:00 UTC	1	1
Aug 5	2014-08-05 00:00:00 UTC	2014-08-06 00:00:00 UTC	0	0
Aug 6	2014-08-06 00:00:00 UTC	2014-08-07 00:00:00 UTC	0	0
Aug 7	2014-08-07 00:00:00 UTC	2014-08-08 00:00:00 UTC	0	0
Aug 8	2014-08-08 00:00:00 UTC	2014-08-09 00:00:00 UTC	0	0
Aug 9	2014-08-09 00:00:00 UTC	2014-08-10 00:00:00 UTC	0	0
Aug 10	2014-08-10 00:00:00 UTC	2014-08-11 00:00:00 UTC	0	0
Aug 11	2014-08-11 00:00:00 UTC	2014-08-12 00:00:00 UTC	0	0
Aug 12	2014-08-12 00:00:00 UTC	2014-08-13 00:00:00 UTC	0	0
Aug 13	2014-08-13 00:00:00 UTC	2014-08-14 00:00:00 UTC	0	0
Aug 14	2014-08-14 00:00:00 UTC	2014-08-15 00:00:00 UTC	0	0
Aug 15	2014-08-15 00:00:00 UTC	2014-08-16 00:00:00 UTC	0	0
Aug 16	2014-08-16 00:00:00 UTC	2014-08-17 00:00:00 UTC	0	0
Aug 17	2014-08-17 00:00:00 UTC	2014-08-18 00:00:00 UTC	0	0
Aug 18	2014-08-18 00:00:00 UTC	2014-08-19 00:00:00 UTC	0	0
Aug 19	2014-08-19 00:00:00 UTC	2014-08-20 00:00:00 UTC	0	0
Aug 20	2014-08-20 00:00:00 UTC	2014-08-21 00:00:00 UTC	0	0
Aug 21	2014-08-21 00:00:00 UTC	2014-08-22 00:00:00 UTC	0	0
Aug 22	2014-08-22 00:00:00 UTC	2014-08-23 00:00:00 UTC	0	0
Aug 23	2014-08-23 00:00:00 UTC	2014-08-24 00:00:00 UTC	0	0
Aug 24	2014-08-24 00:00:00 UTC	2014-08-25 00:00:00 UTC	0	0
Aug 25	2014-08-25 00:00:00 UTC	2014-08-26 00:00:00 UTC	0	0
Aug 26	2014-08-26 00:00:00 UTC	2014-08-27 00:00:00 UTC	0	0
Aug 27	2014-08-27 00:00:00 UTC	2014-08-28 00:00:00 UTC	1	1

What Hacker News says

2 sources

lastontheboat·Aug 27, 2014

Not right now. It's a huge amount of work to create something competitive, and as soon as you add a JIT you lose most of the safety benefits that Rust provides. There is js.rs (https://github.com/TomBebbington/js.rs) that already exists, however.

In JavaScript: Servo’s only garbage collector

TheHydroImpulse·Aug 4, 2014

It does make it more complex since you now have another layer to deal with. I wouldn't roll by own JIT compiler though, otherwise it would definitely be a crap ton harder. Using something like libjit or llvm's JIT compiler are two good options. It's nice having a normal, interpreted VM then building a JIT compiler later on for extra speed. A recent Rust project called `js.rs`[0] started out with a simple interpreter and swapped it for a JIT compiler using libjit. The biggest difference being you now have to interface with the actual CPU and such. [0] https://github.com/TomBebbington/js.rs

In Show HN: A small virtual machine written in C